[new feature] add divider component (#3755)

src/divider/README.md

@@ -0,0 +1,60 @@
+# Divider
+
+### Install
+
+``` javascript
+import { Divider } from 'vant';
+
+Vue.use(Divider);
+```
+
+## Usage
+
+### Basic Usage
+
+```html
+<van-divider />
+```
+
+### With Text
+
+```html
+<van-divider>Text</van-divider>
+```
+
+### Content Position
+
+```html
+<van-divider content-position="left">Text</van-divider>
+<van-divider content-position="right">Text</van-divider>
+```
+
+### Dashed
+
+```html
+<van-divider dashed>Text</van-divider>
+```
+
+### Custom Style
+
+```html
+<van-divider :style="{ color: '#1989fa', borderColor: '#1989fa', padding: '0 15px' }">
+  Text
+</van-divider>
+```
+
+## API
+
+### Props
+
+| Attribute | Description | Type | Default |
+|------|------|------|------|
+| dashed | Whether to use dashed border | `Boolean` | `false` |
+| hairline | Whether to use hairline | `Boolean` | `true` |
+| content-position | Content position，can be set to `left` `right` | `String` | `center` |
+
+### Cell Slots
+
+| Name | Description |
+|------|------|
+| default | content |