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/react-native/Libraries/ReactNative/AppRegistry.js.flow

@@ -0,0 +1,23 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ * @format
+ */
+
+export type {
+  TaskProvider,
+  ComponentProvider,
+  ComponentProviderInstrumentationHook,
+  AppConfig,
+  Runnable,
+  Runnables,
+  Registry,
+  WrapperComponentProvider,
+  RootViewStyleProvider,
+} from './AppRegistry.flow';
+
+export * as AppRegistry from './AppRegistryImpl';