feat(nbstore): remove async on connection api (#9187)

We should not use async on `connect` and `disconnect`, for `WebSocketConnection` will never connect when offline.

We should handle the connection status of each storage in sync, using the `connection.waitForConnect`

This PR also puts the connection reference count on the `connect` and disconnect`

packages/frontend/apps/electron/src/helper/exposed.ts

@@ -1,10 +1,5 @@
 import { dialogHandlers } from './dialog';
-import {
-  dbEventsV1,
-  dbHandlersV1,
-  nbstoreEvents,
-  nbstoreHandlers,
-} from './nbstore';
+import { dbEventsV1, dbHandlersV1, nbstoreHandlers } from './nbstore';
 import { provideExposed } from './provide';
 import { workspaceEvents, workspaceHandlers } from './workspace';
 
@@ -18,7 +13,6 @@ export const handlers = {
 export const events = {
   db: dbEventsV1,
   workspace: workspaceEvents,
-  nbstore: nbstoreEvents,
 };
 
 const getExposedMeta = () => {