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/lib0/dist/rollup.config.d.ts

@@ -0,0 +1,13 @@
+declare const _default: {
+    input: string[];
+    output: {
+        dir: string;
+        format: string;
+        sourcemap: boolean;
+        entryFileNames: string;
+        chunkFileNames: string;
+    };
+    external: string[];
+}[];
+export default _default;
+//# sourceMappingURL=rollup.config.d.ts.map