Add PyPi publish action.

.github/workflows/publish_pypi.yml

@@ -0,0 +1,36 @@
+name: Publish to PyPI
+
+on:
+  workflow_dispatch:
+
+jobs:
+  pypi-publish:
+    name: Upload release to PyPI
+    runs-on: ubuntu-latest
+    environment: pypi-package
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Python 3.12.2
+        uses: actions/setup-python@v4
+        with:
+          python-version: "3.12.2"
+
+      - name: Install build tools
+        run: |
+          python -m pip install --upgrade pip
+          pip install build twine
+
+      - name: Build package
+        run: |
+          python -m build
+
+      # TODO: Run tests against the built wheel
+
+      - name: Publish to PyPI
+        env:
+          TWINE_USERNAME: __token__
+          TWINE_PASSWORD: ${{ secrets.PYPI_API_TOKEN }}
+        run: |
+          python -m twine upload dist/*