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/Utilities/binaryToBase64.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 strict
+ * @format
+ */
+
+'use strict';
+
+const base64 = require('base64-js');
+
+function binaryToBase64(data: ArrayBuffer | $ArrayBufferView): string {
+  if (data instanceof ArrayBuffer) {
+    // $FlowFixMe[reassign-const]
+    data = new Uint8Array(data);
+  }
+  if (data instanceof Uint8Array) {
+    return base64.fromByteArray(data);
+  }
+  if (!ArrayBuffer.isView(data)) {
+    throw new Error('data must be ArrayBuffer or typed array');
+  }
+  // Already checked that `data` is `DataView` in `ArrayBuffer.isView(data)`
+  const {buffer, byteOffset, byteLength}: DataView = (data: $FlowFixMe);
+  return base64.fromByteArray(new Uint8Array(buffer, byteOffset, byteLength));
+}
+
+export default binaryToBase64;