fix: Revert the Gob cleanup for preview-hierarchy function (#942)

Author: yuwenma

.github/workflows/firebase-hosting-merge.yml

@@ -16,6 +16,9 @@ jobs:
       - uses: actions/setup-node@v3
         with:
           node-version: 16
+      - name: Merge gob branch
+        run: git worktree add ./gob gob && cp -r gob/* .
+          node-version: 16
       - name: Generate Site
         run: make site-generate
       - uses: FirebaseExtended/action-hosting-deploy@4d0d0023f1d92b9b7d16dda64b3d7abd2c98974b