docs: translate useCountDown (#8823)

docs/markdown/use-count-down.en-US.md

@@ -0,0 +1,116 @@
+# useCountDown
+
+### Intro
+
+Used to manage the countdown.
+
+## Usage
+
+### Basic Usage
+
+```html
+<span>Total time：{{ current.total }}</span>
+<span>Remain days：{{ current.days }}</span>
+<span>Remain hours：{{ current.hours }}</span>
+<span>Remain minutes：{{ current.minutes }}</span>
+<span>Remain seconds：{{ current.seconds }}</span>
+<span>Remain milliseconds：{{ current.milliseconds }}</span>
+```
+
+```js
+import { useCountDown } from '@vant/use';
+
+export default {
+  setup() {
+    const countDown = useCountDown({
+      time: 24 * 60 * 60 * 1000,
+    });
+
+    countDown.start();
+
+    return {
+      current: countDown.current,
+    };
+  },
+};
+```
+
+### Millisecond
+
+```js
+import { useCountDown } from '@vant/use';
+
+export default {
+  setup() {
+    const countDown = useCountDown({
+      time: 24 * 60 * 60 * 1000,
+      millisecond: true,
+    });
+    countDown.start();
+
+    return {
+      current: countDown.current,
+    };
+  },
+};
+```
+
+## API
+
+### Type Declarations
+
+```ts
+type CurrentTime = {
+  days: number;
+  hours: number;
+  total: number;
+  minutes: number;
+  seconds: number;
+  milliseconds: number;
+};
+
+type CountDown = {
+  start: () => void;
+  pause: () => void;
+  reset: (totalTime: number) => void;
+  current: ComputedRef<CurrentTime>;
+};
+
+type UseCountDownOptions = {
+  time: number;
+  millisecond?: boolean;
+  onChange?: (current: CurrentTime) => void;
+  onFinish?: () => void;
+};
+
+function useCountDown(options: UseCountDownOptions): CountDown;
+```
+
+### Params
+
+| Name | Description | Type | Default Value |
+| --- | --- | --- | --- |
+| time | Total time, unit milliseconds | _number_ | - |
+| millisecond | Whether to enable millisecond render | _boolean_ | `false` |
+| onChange | Triggered when count down changed | _(current: CurrentTime) => void_ | - |
+| onFinish | Triggered when count down finished | - |
+
+### Return Value
+
+| Name    | Description         | Type                    |
+| ------- | ------------------- | ----------------------- |
+| current | Current remain time | _CurrentTime_           |
+| start   | Start count down    | _() => void_            |
+| pause   | Pause count down    | _() => void_            |
+| reset   | Reset count down    | _(time?: number): void_ |
+
+### CurrentTime Structure
+
+| Name         | Description                   | Type     |
+| ------------ | ----------------------------- | -------- |
+| total        | Total time, unit milliseconds | _number_ |
+| days         | Remain days                   | _number_ |
+| hours        | Remain hours                  | _number_ |
+| minutes      | Remain minutes                | _number_ |
+| seconds      | Remain seconds                | _number_ |
+| milliseconds | Remain milliseconds           | _number_ |

docs/markdown/use-count-down.zh-CN.md

@@ -39,7 +39,7 @@ export default {
 
 ### 毫秒级渲染
 
-倒计时默认每秒渲染一次，设置 millisecond 属性可以开启毫秒级渲染。
+倒计时默认每秒渲染一次，设置 millisecond 选项可以开启毫秒级渲染。
 
 ```js
 import { useCountDown } from '@vant/use';

src/count-down/README.md

@@ -130,7 +130,7 @@ export default {
 
 | Attribute | Description | Type | Default |
 | --- | --- | --- | --- |
-| time | Total time | _number \| string_ | `0` |
+| time | Total time, unit milliseconds | _number \| string_ | `0` |
 | format | Time format | _string_ | `HH:mm:ss` |
 | auto-start | Whether to auto start count down | _boolean_ | `true` |
 | millisecond | Whether to enable millisecond render | _boolean_ | `false` |
@@ -160,7 +160,7 @@ export default {
 | ------- | -------------- | -------------------------- |
 | default | Custom Content | _currentTime: CurrentTime_ |
 
-### TimeData Structure
+### CurrentTime Structure
 
 | Name         | Description                   | Type     |
 | ------------ | ----------------------------- | -------- |

vant.config.js

@@ -822,10 +822,10 @@ module.exports = {
                 path: 'use-toggle',
                 title: 'useToggle',
               },
-              // {
-              //   path: 'use-count-down',
-              //   title: 'useCountDown',
-              // },
+              {
+                path: 'use-count-down',
+                title: 'useCountDown',
+              },
               // {
               //   path: 'use-rect',
               //   title: 'useRect',