ci: add PyPI release workflow with trusted publishing

.github/workflows/release.yml

@@ -0,0 +1,84 @@
+name: Release
+
+on:
+  push:
+    tags:
+      - "v*.*.*"
+
+permissions:
+  contents: read
+
+jobs:
+  build:
+    name: Build sdist and wheel
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.12"
+
+      - name: Verify tag matches pyproject version
+        run: |
+          TAG="${GITHUB_REF_NAME#v}"
+          PROJ=$(python -c "import tomllib,sys; print(tomllib.loads(open('pyproject.toml','rb').read().decode())['project']['version'])")
+          if [ "$TAG" != "$PROJ" ]; then
+            echo "::error::Tag $GITHUB_REF_NAME does not match pyproject version $PROJ"
+            exit 1
+          fi
+          echo "Tag and pyproject version match: $PROJ"
+
+      - name: Install build tooling
+        run: |
+          python -m pip install --upgrade pip
+          pip install build twine
+
+      - name: Build distributions
+        run: python -m build
+
+      - name: Check distributions
+        run: twine check --strict dist/*
+
+      - uses: actions/upload-artifact@v4
+        with:
+          name: dist
+          path: dist/
+
+  publish-pypi:
+    name: Publish to PyPI
+    needs: build
+    runs-on: ubuntu-latest
+    environment:
+      name: pypi
+      url: https://pypi.org/p/rkn-block-checker
+    permissions:
+      id-token: write
+    steps:
+      - uses: actions/download-artifact@v4
+        with:
+          name: dist
+          path: dist/
+
+      - name: Publish to PyPI
+        uses: pypa/gh-action-pypi-publish@release/v1
+
+  github-release:
+    name: Attach artifacts to GitHub Release
+    needs: publish-pypi
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    steps:
+      - uses: actions/download-artifact@v4
+        with:
+          name: dist
+          path: dist/
+
+      - name: Create GitHub Release
+        uses: softprops/action-gh-release@v2
+        with:
+          files: dist/*
+          generate_release_notes: true
+          fail_on_unmatched_files: true