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/isows/index.ts

@@ -0,0 +1,11 @@
+import * as WebSocket_ from "ws";
+import { getNativeWebSocket } from "./utils.js";
+
+export const WebSocket = (() => {
+  try {
+    return getNativeWebSocket();
+  } catch {
+    if (WebSocket_.WebSocket) return WebSocket_.WebSocket;
+    return WebSocket_;
+  }
+})();