feat(frontend): upgrade Storybook and add extension component documentation (#36498)

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

.github/workflows/superset-frontend.yml

@@ -167,3 +167,21 @@ jobs:
         run: |
           docker run --rm $TAG bash -c \
           "npm run plugins:build-storybook"
+
+  test-storybook:
+    needs: frontend-build
+    if: needs.frontend-build.outputs.should-run == 'true'
+    runs-on: ubuntu-24.04
+    steps:
+      - name: Download Docker Image Artifact
+        uses: actions/download-artifact@v6
+        with:
+          name: docker-image
+
+      - name: Load Docker Image
+        run: docker load < docker-image.tar.gz
+
+      - name: Build Storybook and Run Tests
+        run: |
+          docker run --rm $TAG bash -c \
+          "npm run build-storybook && npx playwright install-deps && npx playwright install chromium && npm run test-storybook:ci"