feat: establish NekoNest Cloud control and relay

app/dashboard/loading.tsx

@@ -0,0 +1,10 @@
+import { RouteLoadingState } from "../components/RouteStates";
+
+export default function DashboardLoading() {
+  return (
+    <RouteLoadingState
+      area="控制台"
+      description="正在核对账户、公测权益、主机和服务状态，请稍候。"
+    />
+  );
+}