add github action to publish releases for tags

This action responds when a tag is pushed to the
main repository to build and upload both sdist and
wheels to pypi.org. More details in
https://help.github.com/en/actions/language-and-framework-guides/using-python-with-github-actions#publishing-to-package-registries

.github/workflows/python-publish.yml

@@ -0,0 +1,38 @@
+# This workflows will upload a Python Package using Twine when a release is created
+# For more information see: https://help.github.com/en/actions/language-and-framework-guides/using-python-with-github-actions#publishing-to-package-registries
+
+name: Upload Python Package
+
+on:
+  - push
+
+jobs:
+  build-n-publish:
+    name: Build and publish Python distributions to PyPI
+    if: ${{ github.repository_owner == 'mjpost' }}
+
+    runs-on: ubuntu-latest
+    environment: release
+
+    permissions:
+      # IMPORTANT: this permission is mandatory for trusted publishing
+      id-token: write
+
+    steps:
+    - uses: actions/checkout@v4
+      # with:
+      #   fetch-depth: 0
+    - name: Set up Python
+      uses: actions/setup-python@v5
+      with:
+        python-version: '3.11'
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install .[build]
+    - name: Build sdist and wheel
+      run: |
+        python -m build
+    - name: Publish distribution to PyPI
+      if: startsWith(github.ref, 'refs/tags')
+      uses: pypa/gh-action-pypi-publish@release/v1