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/DisplayMode.js

@@ -0,0 +1,32 @@
+/**
+ * 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 strict-local
+ * @format
+ */
+
+export opaque type DisplayModeType = number;
+
+/** DisplayMode should be in sync with the method displayModeToInt from
+ * react/renderer/uimanager/primitives.h. */
+const DisplayMode: {+[string]: DisplayModeType} = Object.freeze({
+  VISIBLE: 1,
+  SUSPENDED: 2,
+  HIDDEN: 3,
+});
+
+export function coerceDisplayMode(value: ?number): DisplayModeType {
+  switch (value) {
+    case DisplayMode.SUSPENDED:
+      return DisplayMode.SUSPENDED;
+    case DisplayMode.HIDDEN:
+      return DisplayMode.HIDDEN;
+    default:
+      return DisplayMode.VISIBLE;
+  }
+}
+
+export default DisplayMode;