chore: change docs

.vitepress/components/demo.vue

@@ -0,0 +1,17 @@
+<script lang="ts" setup>
+import { onMounted, shallowRef } from 'vue'
+
+const comp = shallowRef()
+onMounted(async () => {
+  const { AntdTheme } = await import('vite-plugin-vitepress-demo/theme')
+  comp.value = AntdTheme
+})
+</script>
+
+<template>
+  <ClientOnly>
+    <component v-bind="$attrs" :is="comp"></component>
+  </ClientOnly>
+</template>
+
+<style scoped></style>