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/AppContainer.js

@@ -0,0 +1,31 @@
+/**
+ * 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
+ */
+
+import type {ViewStyleProp} from '../StyleSheet/StyleSheet';
+import type {RootTag} from './RootTag';
+
+import * as React from 'react';
+
+export type Props = Readonly<{
+  children?: React.Node,
+  fabric?: boolean,
+  rootTag: number | RootTag,
+  initialProps?: {...},
+  WrapperComponent?: ?React.ComponentType<any>,
+  rootViewStyle?: ?ViewStyleProp,
+  internal_excludeLogBox?: boolean,
+  internal_excludeInspector?: boolean,
+}>;
+
+const AppContainer: component(...Props) = __DEV__
+  ? require('./AppContainer-dev').default
+  : require('./AppContainer-prod').default;
+
+export default AppContainer;