Add publish to PyPI workflow

.github/workflows/publish.yml

@@ -0,0 +1,50 @@
+name: Publish
+
+on:
+  release:
+    types: [published]
+
+env:
+  HATCH_VERSION: "1.12.0"
+  PACKAGE_NAME: "jupyterlab-open-warning"
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Install Hatch
+        run: pipx install hatch==${{ env.HATCH_VERSION }}
+
+      - name: Set up Node
+        uses: actions/setup-node@v4
+        with:
+          node-version-file: .nvmrc
+
+      - name: Build package
+        run: hatch build
+
+      - name: Upload package artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: ${{ env.PACKAGE_NAME }}-release
+          path: dist
+
+  publish:
+    needs: build
+    runs-on: ubuntu-latest
+    environment:
+      name: pypi
+      url: https://pypi.org/project/${{ env.PACKAGE_NAME }}
+    permissions:
+      id-token: write
+    steps:
+      - uses: actions/download-artifact@v4
+        with:
+          name: ${{ env.PACKAGE_NAME }}-release
+          path: dist
+
+      - name: Publish to PyPI
+        uses: pypa/gh-action-pypi-publish@release/v1