feat: create getAdminStore() func

src/storages/adminStore.ts

@@ -0,0 +1,7 @@
+import { UserStore } from '@/storages/UserStore.ts';
+import { Conf } from '@/config.ts';
+import { eventsDB } from '@/storages.ts';
+
+export function getAdminStore() {
+  return new UserStore(Conf.pubkey, eventsDB);
+}