feat(@vant/use): support cleanup useEventListener (#11540)

packages/vant/docs/markdown/use-event-listener.en-US.md

@@ -31,6 +31,25 @@ export default {
 };
 ```
 
+### Remove Event Listener
+
+`useEventListener` will return a `cleanup` function，you can call it to remove the event listener.
+
+```js
+import { ref } from 'vue';
+import { useEventListener } from '@vant/use';
+
+export default {
+  setup() {
+    const cleanup = useEventListener('resize', () => {
+      console.log('window resize');
+    });
+
+    cleanup();
+  },
+};
+```
+
 ## API
 
 ### Type Declarations
@@ -46,7 +65,7 @@ function useEventListener(
   type: string,
   listener: EventListener,
   options?: Options
-): void;
+): () => void;
 ```
 
 ### Params

packages/vant/docs/markdown/use-event-listener.zh-CN.md

@@ -32,6 +32,25 @@ export default {
 };
 ```
 
+### 取消事件监听
+
+`useEventListener` 会返回一个 `cleanup` 函数，调用该函数可以取消事件监听。
+
+```js
+import { ref } from 'vue';
+import { useEventListener } from '@vant/use';
+
+export default {
+  setup() {
+    const cleanup = useEventListener('resize', () => {
+      console.log('window resize');
+    });
+
+    cleanup();
+  },
+};
+```
+
 ## API
 
 ### 类型定义
@@ -47,7 +66,7 @@ function useEventListener(
   type: string,
   listener: EventListener,
   options?: Options
-): void;
+): () => void;
 ```
 
 ### 参数