Add CD workflow

.github/workflows/cd.yml

@@ -0,0 +1,82 @@
+name: CD
+
+on:
+  merge_group:
+  push:
+    branches:
+      - main
+    tags:
+      - '*'
+  release:
+    types: [published]
+
+permissions:
+  contents: read
+
+jobs:
+  packaging:
+    if: github.repository_owner == 'sgkit-dev'
+    name: Packaging
+    runs-on: ubuntu-24.04
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd  # v6.0.2
+        with:
+          fetch-depth: 0
+          persist-credentials: false
+
+      - name: Install uv and set the python version
+        uses: astral-sh/setup-uv@08807647e7069bb48b6ef5acd8ec9567f424441b  # v8.1.0
+        with:
+          python-version: "3.12"
+          enable-cache: false
+
+      - name: Build artefacts
+        run: uv build
+
+      - name: Store the distribution packages
+        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a  # v7.0.1
+        with:
+          name: python-package-distributions
+          path: dist/
+
+  publish-to-pypi:
+    if: github.repository_owner == 'sgkit-dev' && github.event_name == 'release'
+    needs:
+      - packaging
+    runs-on: ubuntu-latest
+
+    environment:
+      name: pypi
+      url: https://pypi.org/p/vczstore
+    permissions:
+      id-token: write  # IMPORTANT: mandatory for trusted publishing
+
+    steps:
+    - uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c  # v8.0.1
+      with:
+        name: python-package-distributions
+        path: dist/
+    - uses: pypa/gh-action-pypi-publish@cef221092ed1bacb1cc03d23a2d87d1d172e277b  # release/v1
+
+
+  publish-to-testpypi:
+    if: github.repository_owner == 'sgkit-dev' && github.event_name == 'push' && startsWith(github.event.ref, 'refs/tags')
+    needs:
+      - packaging
+    runs-on: ubuntu-latest
+
+    environment:
+      name: testpypi
+      url: https://test.pypi.org/p/vczstore
+
+    permissions:
+      id-token: write  # IMPORTANT: mandatory for trusted publishing
+
+    steps:
+    - uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c  # v8.0.1
+      with:
+        name: python-package-distributions
+        path: dist/
+    - uses: pypa/gh-action-pypi-publish@cef221092ed1bacb1cc03d23a2d87d1d172e277b  # release/v1
+      with:
+        repository-url: https://test.pypi.org/legacy/