[Doc] rename component README file (#3662)

src/steps/README.md

@@ -0,0 +1,86 @@
+# Steps
+
+### Install
+
+``` javascript
+import { Step, Steps } from 'vant';
+
+Vue.use(Step).use(Steps);
+```
+
+## Usage
+
+### Basic Usage
+
+```html
+<van-steps :active="active">
+  <van-step>Step1</van-step>
+  <van-step>Step2</van-step>
+  <van-step>Step3</van-step>
+  <van-step>Step4</van-step>
+</van-steps>
+```
+
+```javascript
+export default {
+  data() {
+    return {
+      active: 1
+    };
+  }
+}
+```
+
+### Custom Style
+
+```html
+<van-steps
+  :active="active"
+  active-icon="success"
+  active-color="#38f"
+>
+  <van-step>Step1</van-step>
+  <van-step>Step2</van-step>
+  <van-step>Step3</van-step>
+  <van-step>Step4</van-step>
+</van-steps>
+```
+
+### Vertical Steps
+
+```html
+<van-steps direction="vertical" :active="0">
+  <van-step>
+    <h3>【City】Status1</h3>
+    <p>2016-07-12 12:40</p>
+  </van-step>
+  <van-step>
+    <h3>【City】Status2</h3>
+    <p>2016-07-11 10:00</p>
+  </van-step>
+  <van-step>
+    <h3>【City】Status3</h3>
+    <p>2016-07-10 09:30</p>
+  </van-step>
+</van-steps>
+```
+
+## API
+
+### Steps Props
+
+| Attribute | Description | Type | Default |
+|------|------|------|------|
+| active | Active step | `Number` | 0 |
+| description | Description | `String` | - |
+| direction | Can be set to `vertical` | `String` | `horizontal` |
+| active-color | Active step color | `String` | `#07c160` |
+| active-icon | Active icon name | `String` | `checked` |
+| inactive-icon | Active icon name | `String` | - |
+
+### Step Slots
+
+| Name | Description |
+|------|------|
+| active-icon | Custom active icon |
+| inactive-icon | Custom inactive icon |