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/preact/compat/server.mjs

@@ -0,0 +1,15 @@
+import { renderToString } from 'preact-render-to-string';
+import { renderToPipeableStream } from 'preact-render-to-string/stream-node';
+
+export {
+	renderToString,
+	renderToString as renderToStaticMarkup
+} from 'preact-render-to-string';
+
+export { renderToPipeableStream } from 'preact-render-to-string/stream-node';
+
+export default {
+	renderToString,
+	renderToStaticMarkup: renderToString,
+	renderToPipeableStream
+};