Add Windmill workflows and Git auto-sync

- Add wmill.yaml configuration with includes for f/**, u/**, g/**
- Add sync_to_git.sh script for automatic Git synchronization
- Add initial workflows synced from Windmill:
  - Test script: u/antigravity/test_git_sync
  - Admin scripts: u/admin/hub_sync
  - Setup app: g/all/setup_app
  - Folders: f/app_custom, f/app_groups, f/app_themes

workflows/u/antigravity/test_git_sync.py

@@ -0,0 +1,4 @@
+def main():
+        print("Hello from Git Sync Test")
+            return {"status": "success"}
+