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/vite-node/dist/hmr.mjs

@@ -0,0 +1,9 @@
+export { c as createHmrEmitter, a as createHotContext, g as getCache, h as handleMessage, r as reload, s as sendMessageBuffer, v as viteNodeHmrPlugin } from './chunk-hmr.mjs';
+import 'node:events';
+import 'picocolors';
+import 'debug';
+import './utils.mjs';
+import 'node:url';
+import 'node:module';
+import 'node:fs';
+import 'pathe';