.github: Add release workflow

Upload a pypi package when a Github release is published.

Signed-off-by: Pieter De Gendt <pieter.degendt@basalte.be>

.github/workflows/release.yml

@@ -0,0 +1,40 @@
+name: Release
+
+# This workflow follows Pypi guidelines for publishing using trusted publishers
+# See https://docs.pypi.org/trusted-publishers/using-a-publisher/ for more details.
+
+on:
+  release:
+    types: [published]
+
+jobs:
+  package:
+    name: Package
+    uses: ./.github/workflows/package.yml
+
+  release:
+    name: Release
+    needs: [package]
+    runs-on: ubuntu-latest
+
+    # Make the GH environment explicit
+    environment: release
+
+    # Mandatory for trusted publishing
+    permissions:
+      contents: write
+      id-token: write
+
+    steps:
+    - name: Download build artifacts
+      uses: actions/download-artifact@v4
+      with:
+        path: dist/
+
+    - name: Upload release assets
+      uses: softprops/action-gh-release@v2
+      with:
+        files: dist/*.whl
+
+    - name: Publish package to PyPI
+      uses: pypa/gh-action-pypi-publish@release/v1