B2B-88: add starter kit structure and elements

app/home/(user)/_components/user-notifications.tsx

@@ -0,0 +1,16 @@
+import { NotificationsPopover } from '@kit/notifications/components';
+
+import featuresFlagConfig from '~/config/feature-flags.config';
+
+export function UserNotifications(props: { userId: string }) {
+  if (!featuresFlagConfig.enableNotifications) {
+    return null;
+  }
+
+  return (
+    <NotificationsPopover
+      accountIds={[props.userId]}
+      realtime={featuresFlagConfig.realtimeNotifications}
+    />
+  );
+}