feat: disconnect collab websocket on idle tabs (#848)

* disconnect real-time collab if user is idle
* log yjs document disconnect and unload in dev mode
* no longer set editor to read-only mode on collab websocket disconnection
* treat delayed collab websocket "connecting" state as disconnected
* increase maxDebounce to 45 seconds
* add reset handle to useIdle hook

apps/server/src/collaboration/extensions/logger.extension.ts

@@ -0,0 +1,19 @@
+import {
+  Extension,
+  onDisconnectPayload,
+  onLoadDocumentPayload,
+} from '@hocuspocus/server';
+import { Injectable, Logger } from '@nestjs/common';
+
+@Injectable()
+export class LoggerExtension implements Extension {
+  private readonly logger = new Logger('Collab' + LoggerExtension.name);
+
+  async onDisconnect(data: onDisconnectPayload) {
+    this.logger.debug(`User disconnected from "${data.documentName}".`);
+  }
+
+  async afterUnloadDocument(data: onLoadDocumentPayload) {
+    this.logger.debug('Unloaded ' + data.documentName + ' from memory');
+  }
+}