Add manual PyPI publishing workflow

.github/workflows/publish.yml

@@ -0,0 +1,26 @@
+name: Publish to PyPI
+on: workflow_dispatch
+permissions:
+  contents: read
+concurrency: pypi-publish
+
+jobs:
+  publish:
+    runs-on: ubuntu-24.04
+    environment: pypi
+    permissions:
+      contents: read
+      id-token: write
+    steps:
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1  # v7.0.1
+        with:
+          persist-credentials: false
+      - uses: actions/setup-python@5fda3b95a4ea91299a34e894583c3862153e4b97  # v7.0.0
+        with:
+          python-version: '3.11'
+      - run: python -m pip install build twine
+      - name: Build and check distributions
+        run: |
+          python -m build
+          python -m twine check --strict dist/*
+      - uses: pypa/gh-action-pypi-publish@dc37677b2e1c63e2034f94d8a5b11f265b73ba33  # release/v1