feat: add release workflow

.github/workflows/release.yml

@@ -0,0 +1,45 @@
+name: Release Extension
+
+on:
+  release:
+    types: [published]
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v3
+        with:
+          node-version: 22
+
+      - name: Install dependencies
+        run: npm ci
+        working-directory: functions
+
+      - name: Check formatting
+        run: npm run format:check
+        working-directory: functions
+
+      - name: Build functions
+        run: npm run build
+        working-directory: functions
+
+      - name: Run tests
+        run: npx vitest run
+        working-directory: functions
+
+      - name: Install Firebase CLI
+        run: npm install -g firebase-tools
+
+      - name: Authenticate to Firebase
+        run: firebase login:ci --token "${{ secrets.FIREBASE_TOKEN }}"
+
+      - name: Publish extension to Firebase Extensions Hub
+        run: firebase ext:dev:publish firestore-web-scraper
+        env:
+          FIREBASE_TOKEN: ${{ secrets.FIREBASE_TOKEN }}