Support uv requirement upgrade diffs

[bmtcril]

When using uv workflows for managing Python requirements the comments on requirement PRs are empty, and the diffs on uv.lock are huge and unreadable. These changes should at least make the comments work again.

Note: Because uv does a better job of managing different versions of Python the output now is a lot more verbose. Previously if we ran a requirements upgrade, it would only pick up the dependency versions for the version of Python we ran the script against. Now if we support multiple Python versions (or specific platforms like Win32) we get a line of text for each. There doesn't seem to be an easy way to consolidate those lines since they can differ along a variety of axes, but I'm open to suggestions.

Example output:

Valid reqs:

- `cachetools - python_full_version == '3.10.*'` changes from `7.0.1` to `7.0.5`
- `cachetools - python_full_version == '3.11.*' and sys_platform != 'emscripten' and sys_platform != 'win32'` changes from `7.0.1` to `7.0.5`
- `cachetools - python_full_version == '3.11.*' and sys_platform == 'emscripten'` changes from `7.0.1` to `7.0.5`
- `cachetools - python_full_version == '3.11.*' and sys_platform == 'win32'` changes from `7.0.1` to `7.0.5`
- `cachetools - python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform != 'emscripten' and sys_platform != 'win32'` changes from `7.0.1` to `7.0.5`
- `cachetools - python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform == 'emscripten'` changes from `7.0.1` to `7.0.5`
- `cachetools - python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform == 'win32'` changes from `7.0.1` to `7.0.5`
- `cachetools - python_full_version >= '3.14' and sys_platform != 'emscripten' and sys_platform != 'win32'` changes from `7.0.1` to `7.0.5`
- `cachetools - python_full_version >= '3.14' and sys_platform == 'emscripten'` changes from `7.0.1` to `7.0.5`
- `cachetools - python_full_version >= '3.14' and sys_platform == 'win32'` changes from `7.0.1` to `7.0.5`
- `charset-normalizer` changes from `3.4.4` to `3.4.5`
- `code-annotations - python_full_version == '3.11.*' and sys_platform != 'emscripten' and sys_platform != 'win32'` changes from `2.3.0` to `2.3.2`
- `code-annotations - python_full_version == '3.11.*' and sys_platform == 'emscripten'` changes from `2.3.0` to `2.3.2`
- `code-annotations - python_full_version == '3.11.*' and sys_platform == 'win32'` changes from `2.3.0` to `2.3.2`
- `code-annotations - python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform != 'emscripten' and sys_platform != 'win32'` changes from `2.3.0` to `2.3.2`
- `code-annotations - python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform == 'emscripten'` changes from `2.3.0` to `2.3.2`
- `code-annotations - python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform == 'win32'` changes from `2.3.0` to `2.3.2`
- `code-annotations - python_full_version >= '3.14' and sys_platform != 'emscripten' and sys_platform != 'win32'` changes from `2.3.0` to `2.3.2`
- `code-annotations - python_full_version >= '3.14' and sys_platform == 'emscripten'` changes from `2.3.0` to `2.3.2`
- `code-annotations - python_full_version >= '3.14' and sys_platform == 'win32'` changes from `2.3.0` to `2.3.2`
- `fastcore - python_full_version == '3.10.*'` changes from `1.12.22` to `1.12.24`
- `fastcore - python_full_version == '3.11.*' and sys_platform != 'emscripten' and sys_platform != 'win32'` changes from `1.12.22` to `1.12.24`
- `fastcore - python_full_version == '3.11.*' and sys_platform == 'emscripten'` changes from `1.12.22` to `1.12.24`
- `fastcore - python_full_version == '3.11.*' and sys_platform == 'win32'` changes from `1.12.22` to `1.12.24`
- `fastcore - python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform != 'emscripten' and sys_platform != 'win32'` changes from `1.12.22` to `1.12.24`
- `fastcore - python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform == 'emscripten'` changes from `1.12.22` to `1.12.24`
- `fastcore - python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform == 'win32'` changes from `1.12.22` to `1.12.24`
- `fastcore - python_full_version >= '3.14' and sys_platform != 'emscripten' and sys_platform != 'win32'` changes from `1.12.22` to `1.12.24`
- `fastcore - python_full_version >= '3.14' and sys_platform == 'emscripten'` changes from `1.12.22` to `1.12.24`
- `fastcore - python_full_version >= '3.14' and sys_platform == 'win32'` changes from `1.12.22` to `1.12.24`
- `filelock - python_full_version == '3.10.*'` changes from `3.25.0` to `3.25.2`
- `filelock - python_full_version == '3.11.*' and sys_platform != 'emscripten' and sys_platform != 'win32'` changes from `3.25.0` to `3.25.2`
- `filelock - python_full_version == '3.11.*' and sys_platform == 'emscripten'` changes from `3.25.0` to `3.25.2`
- `filelock - python_full_version == '3.11.*' and sys_platform == 'win32'` changes from `3.25.0` to `3.25.2`
- `filelock - python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform != 'emscripten' and sys_platform != 'win32'` changes from `3.25.0` to `3.25.2`
- `filelock - python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform == 'emscripten'` changes from `3.25.0` to `3.25.2`
- `filelock - python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform == 'win32'` changes from `3.25.0` to `3.25.2`
- `filelock - python_full_version >= '3.14' and sys_platform != 'emscripten' and sys_platform != 'win32'` changes from `3.25.0` to `3.25.2`
- `filelock - python_full_version >= '3.14' and sys_platform == 'emscripten'` changes from `3.25.0` to `3.25.2`
- `filelock - python_full_version >= '3.14' and sys_platform == 'win32'` changes from `3.25.0` to `3.25.2`
- `fonttools - python_full_version == '3.10.*'` changes from `4.61.1` to `4.62.0`
- `fonttools - python_full_version == '3.11.*' and sys_platform != 'emscripten' and sys_platform != 'win32'` changes from `4.61.1` to `4.62.0`
- `fonttools - python_full_version == '3.11.*' and sys_platform == 'emscripten'` changes from `4.61.1` to `4.62.0`
- `fonttools - python_full_version == '3.11.*' and sys_platform == 'win32'` changes from `4.61.1` to `4.62.0`
- `fonttools - python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform != 'emscripten' and sys_platform != 'win32'` changes from `4.61.1` to `4.62.0`
- `fonttools - python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform == 'emscripten'` changes from `4.61.1` to `4.62.0`
- `fonttools - python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform == 'win32'` changes from `4.61.1` to `4.62.0`
- `fonttools - python_full_version >= '3.14' and sys_platform != 'emscripten' and sys_platform != 'win32'` changes from `4.61.1` to `4.62.0`
- `fonttools - python_full_version >= '3.14' and sys_platform == 'emscripten'` changes from `4.61.1` to `4.62.0`
- `fonttools - python_full_version >= '3.14' and sys_platform == 'win32'` changes from `4.61.1` to `4.62.0`
- `kiwisolver - python_full_version == '3.10.*'` changes from `1.4.9` to `1.5.0`
- `kiwisolver - python_full_version == '3.11.*' and sys_platform != 'emscripten' and sys_platform != 'win32'` changes from `1.4.9` to `1.5.0`
- `kiwisolver - python_full_version == '3.11.*' and sys_platform == 'emscripten'` changes from `1.4.9` to `1.5.0`
- `kiwisolver - python_full_version == '3.11.*' and sys_platform == 'win32'` changes from `1.4.9` to `1.5.0`
- `kiwisolver - python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform != 'emscripten' and sys_platform != 'win32'` changes from `1.4.9` to `1.5.0`
- `kiwisolver - python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform == 'emscripten'` changes from `1.4.9` to `1.5.0`
- `kiwisolver - python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform == 'win32'` changes from `1.4.9` to `1.5.0`
- `kiwisolver - python_full_version >= '3.14' and sys_platform != 'emscripten' and sys_platform != 'win32'` changes from `1.4.9` to `1.5.0`
- `kiwisolver - python_full_version >= '3.14' and sys_platform == 'emscripten'` changes from `1.4.9` to `1.5.0`
- `kiwisolver - python_full_version >= '3.14' and sys_platform == 'win32'` changes from `1.4.9` to `1.5.0`
- `numpy - python_full_version == '3.11.*' and sys_platform != 'emscripten' and sys_platform != 'win32'` changes from `2.4.2` to `2.4.3`
- `numpy - python_full_version == '3.11.*' and sys_platform == 'emscripten'` changes from `2.4.2` to `2.4.3`
- `numpy - python_full_version == '3.11.*' and sys_platform == 'win32'` changes from `2.4.2` to `2.4.3`
- `numpy - python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform != 'emscripten' and sys_platform != 'win32'` changes from `2.4.2` to `2.4.3`
- `numpy - python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform == 'emscripten'` changes from `2.4.2` to `2.4.3`
- `numpy - python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform == 'win32'` changes from `2.4.2` to `2.4.3`
- `numpy - python_full_version >= '3.14' and sys_platform != 'emscripten' and sys_platform != 'win32'` changes from `2.4.2` to `2.4.3`
- `numpy - python_full_version >= '3.14' and sys_platform == 'emscripten'` changes from `2.4.2` to `2.4.3`
- `numpy - python_full_version >= '3.14' and sys_platform == 'win32'` changes from `2.4.2` to `2.4.3`
- `platformdirs - python_full_version == '3.10.*'` changes from `4.9.2` to `4.9.4`
- `platformdirs - python_full_version == '3.11.*' and sys_platform != 'emscripten' and sys_platform != 'win32'` changes from `4.9.2` to `4.9.4`
- `platformdirs - python_full_version == '3.11.*' and sys_platform == 'emscripten'` changes from `4.9.2` to `4.9.4`
- `platformdirs - python_full_version == '3.11.*' and sys_platform == 'win32'` changes from `4.9.2` to `4.9.4`
- `platformdirs - python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform != 'emscripten' and sys_platform != 'win32'` changes from `4.9.2` to `4.9.4`
- `platformdirs - python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform == 'emscripten'` changes from `4.9.2` to `4.9.4`
- `platformdirs - python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform == 'win32'` changes from `4.9.2` to `4.9.4`
- `platformdirs - python_full_version >= '3.14' and sys_platform != 'emscripten' and sys_platform != 'win32'` changes from `4.9.2` to `4.9.4`
- `platformdirs - python_full_version >= '3.14' and sys_platform == 'emscripten'` changes from `4.9.2` to `4.9.4`
- `platformdirs - python_full_version >= '3.14' and sys_platform == 'win32'` changes from `4.9.2` to `4.9.4`
- `python-discovery` changes from `1.1.0` to `1.1.3`
- `smmap` changes from `5.0.2` to `5.0.3`
- `tox - python_full_version == '3.10.*'` changes from `4.47.0` to `4.49.1`
- `tox - python_full_version == '3.11.*' and sys_platform != 'emscripten' and sys_platform != 'win32'` changes from `4.47.0` to `4.49.1`
- `tox - python_full_version == '3.11.*' and sys_platform == 'emscripten'` changes from `4.47.0` to `4.49.1`
- `tox - python_full_version == '3.11.*' and sys_platform == 'win32'` changes from `4.47.0` to `4.49.1`
- `tox - python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform != 'emscripten' and sys_platform != 'win32'` changes from `4.47.0` to `4.49.1`
- `tox - python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform == 'emscripten'` changes from `4.47.0` to `4.49.1`
- `tox - python_full_version >= '3.12' and python_full_version < '3.14' and sys_platform == 'win32'` changes from `4.47.0` to `4.49.1`
- `tox - python_full_version >= '3.14' and sys_platform != 'emscripten' and sys_platform != 'win32'` changes from `4.47.0` to `4.49.1`
- `tox - python_full_version >= '3.14' and sys_platform == 'emscripten'` changes from `4.47.0` to `4.49.1`
- `tox - python_full_version >= '3.14' and sys_platform == 'win32'` changes from `4.47.0` to `4.49.1`
- `virtualenv` changes from `21.1.0` to `21.2.0`

Suspicious reqs:

- **[MAJOR]** `pytz` changes from `2025.2` to `2026.1.post1`
- **[NEW]**  `testing123` (`1.0`) added to the requirements
- **[REMOVED]**  `testing321` (`1.0.0`) removed from the requirements
- **[NEW]**  `tomli-w` (`1.2.0`) added to the requirements