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/yaml/dist/compose/resolve-end.d.ts

@@ -0,0 +1,6 @@
+import type { SourceToken } from '../parse/cst';
+import type { ComposeErrorHandler } from './composer';
+export declare function resolveEnd(end: SourceToken[] | undefined, offset: number, reqSpace: boolean, onError: ComposeErrorHandler): {
+    comment: string;
+    offset: number;
+};