feat: add modal and drawer components and examples (#4229)

* feat: add modal component

* feat: add drawer component

* feat: apply new modal and drawer components to the layout

* chore: typo

* feat: add some unit tests

playground/src/views/examples/ellipsis/index.vue

@@ -13,7 +13,7 @@ const text = ref(longText);
 <template>
   <Page
     description="用于多行文本省略，支持点击展开和自定义内容。"
-    title="文本省略示例"
+    title="文本省略组件示例"
   >
     <Card class="mb-4" title="基本使用">
       <EllipsisText :max-width="500">{{ text }}</EllipsisText>