Remove python package and pyo3

[phillip-wenig-frequenz]

Summary

• Remove the Python package, PyO3 bindings, stubs, Python tests, and Python packaging/docs infrastructure.
• Update the README to document only the Rust crate and point Python users to frequenz-resampling-python.
• Add an upgrade note explaining that Python packaging and bindings moved to the dedicated Python repository.

[phillip-wenig-frequenz]

Delay merging until frequenz-floss/frequenz-resampling-python#17 is merged.

[Copilot]

Pull request overview

This PR removes the in-repo Python package (PyO3 bindings, stubs, tests, and Python tooling/docs) so the repository focuses on shipping and documenting the Rust crate, and directs Python users to the dedicated frequenz-resampling-python repository.

Changes:

• Removed PyO3 bindings and all Python package/test/tooling infrastructure (pyproject, nox, mkdocs, Python CI).
• Updated crate configuration to drop the python feature and pyo3 dependency.
• Updated README and release notes with upgrade guidance for Python users.

Reviewed changes

Copilot reviewed 23 out of 25 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
tests/test_resampler.py	Removed Python binding tests.
tests/__init__.py	Removed Python tests package marker.
src/python.rs	Removed PyO3 module implementation.
src/lib.rs	Removed conditional python module inclusion.
pyproject.toml	Removed Python packaging/build/test configuration.
noxfile.py	Removed nox-based Python automation.
mkdocs.yml	Removed MkDocs site configuration for Python docs.
frequenz/resampling/_rust_backend.pyi	Removed Python typing stubs for the Rust backend module.
frequenz/resampling/__init__.py	Removed Python package entrypoint exports.
docs/reference.md	Removed Python API reference page.
docs/index.md	Removed docs index that embedded README.
docs/_scripts/mkdocstrings_autoapi.py	Removed mkdocstrings auto-API generation script.
docs/_overrides/main.html	Removed MkDocs theme override.
docs/_css/style.css	Removed docs site custom styling.
docs/_css/mkdocstrings.css	Removed mkdocstrings CSS customization.
docs/SUMMARY.md	Removed MkDocs navigation summary.
RELEASE_NOTES.md	Added upgrade note pointing Python users to the new repo; reset to template-style sections.
README.md	Removed Python usage docs; added pointer to the dedicated Python repository.
Cargo.toml	Removed python feature, pyo3 dependency, and cdylib crate-type used for bindings.
.github/workflows/rust-ci.yaml	Removed PR/push Rust CI workflow.
.github/workflows/repo-config-migration.yaml	Removed repo-config migration workflow.
.github/workflows/python-ci-pr.yaml	Removed Python CI workflow.
.github/dependabot.yml	Removed pip ecosystem updates; kept GitHub Actions and Cargo updates.

Comments suppressed due to low confidence (1)

.github/workflows/rust-ci.yaml:1

• Removing this workflow leaves the repository without any Rust test/build CI on pull_request/push events (the remaining workflow runs cargo test only on tag pushes). Please keep or replace this with an equivalent Rust CI workflow to ensure PRs are validated before merge.

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[phillip-wenig-frequenz]

Some of the workflows are still python related and therefore do not start/finish. We might need to bypass rules for this one.

[llucax]

Don't we still want this here? 😱

[shsms]

Oops, yes, good you caught it. Also, mysterious, that I can't find the rust release ci file.

[shsms]

oh never mind, that's there, so we just need to add this file back. @phillip-wenig-frequenz