[PS-1092] Organization Service Observables (#3462)

* Update imports

* Implement observables in a few places

* Add tests

* Get all clients working

* Use _destroy

* Address PR feedback

* Address PR feedback

* Address feedback

libs/common/src/services/sync/syncNotifier.service.ts

@@ -0,0 +1,18 @@
+import { Subject } from "rxjs";
+
+import { SyncNotifierService as SyncNotifierServiceAbstraction } from "../../abstractions/sync/syncNotifier.service.abstraction";
+import { SyncEventArgs } from "../../types/syncEventArgs";
+
+/**
+ * This class should most likely have 0 dependencies because it will hopefully
+ * be rolled into SyncService once upon a time.
+ */
+export class SyncNotifierService implements SyncNotifierServiceAbstraction {
+  private _sync = new Subject<SyncEventArgs>();
+
+  sync$ = this._sync.asObservable();
+
+  next(event: SyncEventArgs): void {
+    this._sync.next(event);
+  }
+}