feat: notifications (#1947)

* feat: notifications
* feat: watchers

* improvements

* handle page move for watchers

* make watchers non-blocking

* more

apps/server/src/core/watcher/watcher.module.ts

@@ -0,0 +1,11 @@
+import { Module } from '@nestjs/common';
+import { WatcherService } from './watcher.service';
+import { CaslModule } from '../casl/casl.module';
+
+@Module({
+  imports: [CaslModule],
+  controllers: [],
+  providers: [WatcherService],
+  exports: [WatcherService],
+})
+export class WatcherModule {}