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/@libsql/client/lib-esm/web.d.ts

@@ -0,0 +1,6 @@
+import type { Config, Client } from "@libsql/core/api";
+import type { ExpandedConfig } from "@libsql/core/config";
+export * from "@libsql/core/api";
+export declare function createClient(config: Config): Client;
+/** @private */
+export declare function _createClient(config: ExpandedConfig): Client;