Add workflow to auto publish releases on PyPI (#686)

.github/workflows/release.yml

@@ -0,0 +1,36 @@
+name: Release
+
+on:
+  workflow_run:
+    workflows: [ Test ]
+    types: [ completed ]
+    branches: [ master ]
+
+jobs:
+  deploy:
+    name: Upload release to PyPI
+    runs-on: ubuntu-latest
+    if: ${{ github.event.workflow_run.conclusion == 'success' && github.event.workflow_run.event == 'push' }}
+    environment:
+      name: release
+      url: https://pypi.org/p/mozdownload
+    permissions:
+      id-token: write
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Python 3.12
+        uses: actions/setup-python@v5
+        with:
+          python-version: 3.12
+
+      - name: Install dependencies
+        run: python -m pip install -U build
+
+      - name: Build a binary wheel and a source tarball
+        run: python -m build
+
+      - name: Upload release to PyPI
+        uses: pypa/gh-action-pypi-publish@release/v1
+
+