docs: change slot to # (#5858)

* docs(SwipeCell): change "slot" to "v-slot"

* docs(SwipeCell): change `v-slot` to`#`

* docs(cell): change `slot` to `#`

* docs(checkbox): change `slot` to `v-slot`

* docs(field): change `slot` to `v-slot`

* docs(checkbox): remove wrong comment

* docs(radio): change `slot` to `#`

* docs(search): change `slot` to `#`

* docs(slider): change `slot` to `#`

* docs(switch): change `slot` to `#`

* docs(PullRefresh): change `slot` to `#`

* docs(collapse): change `slot` to `#`

* docs(panel): change `slot` to `#`

* docs(swipe): change `slot` to `#`

* docs(navbar): change `slot` to `#`

* docs(tab): change `slot` to `#`

* docs(tabber): change `slot` to `#`

* docs(TreeSelect): change `slot` to `#`

* docs(card): change `slot` to `#`

* docs(submitBar): change `slot` to `#`

* docs(sku): change `slot` to `#` unsure

* docs(cell): delete waste blank line

* docs(panel): fix indentation

* docs(PullRefresh): change "count" to "Refresh Count"

* docs(radio): delete waste blank line

* docs(search): move props above the event

* docs(submitBar): delete waste `<span>`

* docs(swipCell): delete waste blank line

* docs(tabbar): merge `<img>` into one line

src/field/README.md

@@ -133,7 +133,9 @@ Use button slot to insert button
   label="SMS"
   placeholder="SMS"
 >
-  <van-button slot="button" size="small" type="primary">Send SMS</van-button>
+  <template #button>
+    <van-button size="small" type="primary">Send SMS</van-button>
+  </template>
 </van-field>
 ```
 

src/field/README.zh-CN.md

@@ -149,7 +149,9 @@ export default {
   label="短信验证码"
   placeholder="请输入短信验证码"
 >
-  <van-button slot="button" size="small" type="primary">发送验证码</van-button>
+  <template #button>
+    <van-button size="small" type="primary">发送验证码</van-button>
+  </template>
 </van-field>
 ```