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

.gitignore

@@ -28,3 +28,17 @@ Thumbs.db
 # Resolved markdown files (generated by editor)
 *.resolved
 *.resolved.*
+
+# Windmill workflows - exclude cache and temp files
+workflows/.wmill/
+
+# Windmill workflows directory
+workflows/.wmill/cache/
+workflows/.wmill/tmp/
+
+# But track the actual workflows
+!workflows/f/
+!workflows/u/
+!workflows/g/
+!workflows/wmill.yaml
+!workflows/wmill-lock.yaml