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/array-buffer-is-detached.js

@@ -0,0 +1,17 @@
+'use strict';
+var globalThis = require('../internals/global-this');
+var NATIVE_ARRAY_BUFFER = require('../internals/array-buffer-basic-detection');
+var arrayBufferByteLength = require('../internals/array-buffer-byte-length');
+
+var DataView = globalThis.DataView;
+
+module.exports = function (O) {
+  if (!NATIVE_ARRAY_BUFFER || arrayBufferByteLength(O) !== 0) return false;
+  try {
+    // eslint-disable-next-line no-new -- thrower
+    new DataView(O);
+    return false;
+  } catch (error) {
+    return true;
+  }
+};