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/@tanstack/react-query/src/useIsFetching.ts

@@ -0,0 +1,24 @@
+'use client'
+import * as React from 'react'
+import { notifyManager } from '@tanstack/query-core'
+
+import { useQueryClient } from './QueryClientProvider'
+import type { QueryClient, QueryFilters } from '@tanstack/query-core'
+
+export function useIsFetching(
+  filters?: QueryFilters,
+  queryClient?: QueryClient,
+): number {
+  const client = useQueryClient(queryClient)
+  const queryCache = client.getQueryCache()
+
+  return React.useSyncExternalStore(
+    React.useCallback(
+      (onStoreChange) =>
+        queryCache.subscribe(notifyManager.batchCalls(onStoreChange)),
+      [queryCache],
+    ),
+    () => client.isFetching(filters),
+    () => client.isFetching(filters),
+  )
+}