add workflow to publish oonidata to PyPI

.github/workflows/release_oonidata.yml

@@ -0,0 +1,32 @@
+name: Publish oonidata to PyPI
+
+on:
+  release:
+    types: [created]
+
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v6
+
+      - name: Set up Python
+        uses: actions/setup-python@v6
+        with:
+          python-version: '3.x'  # Specify the Python version
+
+      - name: Install Hatch
+        run: |
+          python -m pip install --upgrade pip
+          pip install hatch
+
+      - name: Publish oonidata
+        run: |
+          cd oonidata
+          hatch publish
+        env:
+          HATCH_INDEX_USER: __token__
+          HATCH_INDEX_AUTH: ${{ secrets.PYPI_TOKEN }}
+        if: secrets.PYPI_TOKEN != ''  # Only run if PYPI_TOKEN is set