chore: demo page for system/department (#5611)

* feat: department management demo

* perf: department page improve

* feat: demo api middleware

* fix: add losing import

playground/src/router/routes/modules/system.ts

@@ -0,0 +1,28 @@
+import type { RouteRecordRaw } from 'vue-router';
+
+import { $t } from '#/locales';
+
+const routes: RouteRecordRaw[] = [
+  {
+    meta: {
+      icon: 'ion:settings-outline',
+      order: 9997,
+      title: $t('system.title'),
+    },
+    name: 'System',
+    path: '/system',
+    children: [
+      {
+        path: '/system/dept',
+        name: 'SystemDept',
+        meta: {
+          icon: 'charm:organisation',
+          title: $t('system.dept.title'),
+        },
+        component: () => import('#/views/system/dept/list.vue'),
+      },
+    ],
+  },
+];
+
+export default routes;