refactor: migrate demo applications to playground (#4116)

* chore: detail adjustment

* refactor: Migrate demo applications to playground

* perf: logic optimization

* chore: update docs

* chore: update docs

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

@@ -0,0 +1,30 @@
+import type { RouteRecordRaw } from 'vue-router';
+
+import { BasicLayout } from '#/layouts';
+import { $t } from '#/locales';
+
+const routes: RouteRecordRaw[] = [
+  {
+    component: BasicLayout,
+    meta: {
+      icon: 'ion:layers-outline',
+      keepAlive: true,
+      order: 1000,
+      title: $t('page.examples.title'),
+    },
+    name: 'Examples',
+    path: '/examples',
+    children: [
+      {
+        name: 'EllipsisDemo',
+        path: '/examples/ellipsis',
+        component: () => import('#/views/examples/ellipsis/index.vue'),
+        meta: {
+          title: $t('page.examples.ellipsis.title'),
+        },
+      },
+    ],
+  },
+];
+
+export default routes;