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/metro-resolver/src/utils/toPosixPath.d.ts

@@ -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.
+ *
+ * @noformat
+ * @oncall react_native
+ * @generated SignedSource<<091df9100cc8f841af449036a548f6aa>>
+ *
+ * This file was translated from Flow by scripts/generateTypeScriptDefinitions.js
+ * Original file: packages/metro-resolver/src/utils/toPosixPath.js
+ * To regenerate, run:
+ *   js1 build metro-ts-defs (internal) OR
+ *   yarn run build-ts-defs (OSS) 
+ */
+
+/**
+ * Replace path separators in the passed string to coerce to a POSIX path. This
+ * is a no-op on POSIX systems.
+ */
+declare function toPosixPath(relativePathOrSpecifier: string): string;
+export default toPosixPath;