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/zod/v3/errors.d.ts

@@ -0,0 +1,5 @@
+import type { ZodErrorMap } from "./ZodError.js";
+import defaultErrorMap from "./locales/en.js";
+export { defaultErrorMap };
+export declare function setErrorMap(map: ZodErrorMap): void;
+export declare function getErrorMap(): ZodErrorMap;