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/cac/deno/index.ts

@@ -0,0 +1,10 @@
+import CAC from "./CAC.ts";
+import Command from "./Command.ts";
+/**
+ * @param name The program name to display in help and version message
+ */
+
+const cac = (name = '') => new CAC(name);
+
+export default cac;
+export { cac, CAC, Command };