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/core-js/internals/define-global-property.js

@@ -0,0 +1,13 @@
+'use strict';
+var globalThis = require('../internals/global-this');
+
+// eslint-disable-next-line es/no-object-defineproperty -- safe
+var defineProperty = Object.defineProperty;
+
+module.exports = function (key, value) {
+  try {
+    defineProperty(globalThis, key, { value: value, configurable: true, writable: true });
+  } catch (error) {
+    globalThis[key] = value;
+  } return value;
+};