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/vitest/dist/suite-dWqIFb_-.d.ts

@@ -0,0 +1,10 @@
+import { Custom } from '@vitest/runner';
+import '@vitest/runner/utils';
+import { ap as BenchFunction, aq as BenchmarkAPI } from './reporters-w_64AS5f.js';
+import { Options } from 'tinybench';
+
+declare function getBenchOptions(key: Custom): Options;
+declare function getBenchFn(key: Custom): BenchFunction;
+declare const bench: BenchmarkAPI;
+
+export { getBenchOptions as a, bench as b, getBenchFn as g };