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/zustand/middleware/combine.d.ts

@@ -0,0 +1,5 @@
+import type { StateCreator, StoreMutatorIdentifier } from 'zustand/vanilla';
+type Write<T, U> = Omit<T, keyof U> & U;
+type Combine = <T extends object, U extends object, Mps extends [StoreMutatorIdentifier, unknown][] = [], Mcs extends [StoreMutatorIdentifier, unknown][] = []>(initialState: T, additionalStateCreator: StateCreator<T, Mps, Mcs, U>) => StateCreator<Write<T, U>, Mps, Mcs>;
+export declare const combine: Combine;
+export {};