docs: improve typing (#9362)

* docs: improve typing

* docs: upd

src/divider/README.md

@@ -69,6 +69,14 @@ app.use(Divider);
 | ------- | ----------- |
 | default | content     |
 
+### Types
+
+The component exports the following type definitions:
+
+```ts
+import type { DividerContentPosition } from 'vant';
+```
+
 ## Theming
 
 ### CSS Variables

src/divider/README.zh-CN.md

@@ -79,6 +79,14 @@ app.use(Divider);
 | ------- | ---- |
 | default | 内容 |
 
+### 类型定义
+
+组件导出以下类型定义：
+
+```ts
+import type { DividerContentPosition } from 'vant';
+```
+
 ## 主题定制
 
 ### 样式变量