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/isows/README.md

@@ -0,0 +1,33 @@
+# isows
+
+Isomorphic WebSocket implementation for Node.js, Bun, Deno, and modern browsers.
+
+## Install
+
+```bash
+npm i isows
+```
+
+```bash
+pnpm i isows
+```
+
+```bash
+bun i isows
+```
+
+## Usage
+
+```ts
+import { WebSocket } from 'isows'
+
+const ws = new WebSocket('ws://localhost:8080')
+```
+
+## Authors
+
+- [@jxom](https://github.com/jxom) (jxom.eth, [Twitter](https://twitter.com/_jxom))
+
+## License
+
+[MIT](/LICENSE) License