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/@stripe/stripe-js/dist/index.d.mts

@@ -0,0 +1,14 @@
+export * from './api';
+export * from './stripe-js';
+
+import {StripeConstructor} from './stripe-js';
+
+export {loadStripe} from './shared';
+
+declare global {
+  interface Window {
+    // Stripe.js must be loaded directly from https://js.stripe.com/v3, which
+    // places a `Stripe` object on the window
+    Stripe?: StripeConstructor;
+  }
+}