move old contents in

docs/.vitepress/theme/components/TOC.vue

@@ -0,0 +1,16 @@
+<template>
+  <details>
+    <summary>{{ $props.summary }}</summary>
+    <blockquote cite="">
+      <slot></slot>
+    </blockquote>
+  </details>
+</template>
+
+<script setup lang="ts">
+defineProps<{
+  summary?: string;
+}>();
+</script>
+
+<style scoped></style>