feat: add workflow to publish to pypi

.forgejo/workflows/publish.yml

@@ -0,0 +1,32 @@
+name: Publish to PyPI
+
+on:
+  push:
+    tags:
+      - "v*.*.*"
+  workflow_dispatch:
+
+jobs:
+  publish:
+    runs-on: docker
+    container:
+      image: python:3.12-bookworm
+
+    steps:
+      - name: Checkout repository
+        run: |
+          git clone --depth=1 --branch "${{ github.ref_name }}" \
+            "https://oauth2:${{ github.token }}@bitfreedom.net/code/${{ github.repository }}.git" \
+            .
+
+      - name: Install build tools
+        run: pip install build twine
+
+      - name: Build package
+        run: python -m build
+
+      - name: Publish to PyPI
+        env:
+          TWINE_USERNAME: __token__
+          TWINE_PASSWORD: ${{ secrets.PYPI_API_TOKEN }}
+        run: twine upload dist/*