FRE-600: Fix code review blockers

- Consolidated duplicate UndoManagers to single instance
- Fixed connection promise to only resolve on 'connected' status
- Fixed WebSocketProvider import (WebsocketProvider)
- Added proper doc.destroy() cleanup
- Renamed isPresenceInitialized property to avoid conflict

Co-Authored-By: Paperclip <noreply@paperclip.ing>

node_modules/vitest/dist/execute.js

@@ -0,0 +1,11 @@
+export { V as VitestExecutor } from './vendor/execute.fL3szUAI.js';
+import 'node:vm';
+import 'node:url';
+import 'node:fs';
+import 'vite-node/client';
+import 'vite-node/utils';
+import 'pathe';
+import '@vitest/utils/error';
+import './path.js';
+import '@vitest/utils';
+import './vendor/base.5NT-gWu5.js';