gha: add release workflow

Author: bretello

Diff for: .github/workflows/release.yml

@@ -0,0 +1,28 @@
+name: Publish package to PyPI
+
+on:
+  release:
+    types:
+      - published
+  workflow_dispatch:
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v4
+        with:
+          python-version: "3.9"
+      - name: Install requirements
+        run: |
+          pip install -U pip twine build
+      - name: Build
+        run: python -m build
+      - run: check-manifest
+      - run: twine check dist/*
+      - name: Publish to PyPI
+        env:
+          TWINE_USERNAME: "__token__"
+          TWINE_PASSWORD: ${{ secrets.PYPI_TOKEN }}
+        run: twine upload dist/*