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/exponential-backoff/dist/backoff.d.ts

@@ -0,0 +1,9 @@
+import { IBackOffOptions, BackoffOptions } from "./options";
+export { BackoffOptions, IBackOffOptions };
+/**
+ * Executes a function with exponential backoff.
+ * @param request the function to be executed
+ * @param options options to customize the backoff behavior
+ * @returns Promise that resolves to the result of the `request` function
+ */
+export declare function backOff<T>(request: () => Promise<T>, options?: BackoffOptions): Promise<T>;