feat:rename subtree from frontend-vue to frontend

frontend/src/router/index.ts

@@ -0,0 +1,8 @@
+import { createRouter, createWebHistory } from 'vue-router'
+
+const router = createRouter({
+  history: createWebHistory(import.meta.env.BASE_URL),
+  routes: [],
+})
+
+export default router