新增 Alert 文档

docs/renderers/Alert.md

@@ -0,0 +1,19 @@
+## Alert
+
+用来做文字特殊提示，分为四类：提示类、成功类、警告类和危险类。可结合 `visibleOn` 用来做错误信息提示。
+
+| 属性名 | 类型 | 默认值 | 说明 |
+| --------- | --------- | ------------------------------------------------ | ------------------- |
+| type | `string`  | `"alert"` | 指定为 alert 渲染器 |
+| className | `string`  | | 外层 Dom 的类名 |
+| level | `string`  | `info` | 级别，可以是：`info`、`success`、`warning` 或者 `danger` |
+| showCloseButton | `boolean` | false | 是否显示关闭按钮 |
+
+```schema:height="120" scope="body"
+{
+    "type": "alert",
+    "body": "这是一段提示",
+    "level": "warning",
+    "showCloseButton": true
+}
+```

docs/renderers/Audio.md

@@ -17,6 +17,6 @@
 {
     "type": "audio",
     "autoPlay": false,
-    "src": "http://www.ytmp3.cn/down/32791.mp3"
+    "src": "https://amis.bj.bcebos.com/amis/2019-7/1562137295708/chicane-poppiholla-original-radio-edit%20(1).mp3"
 }
 ```

examples/components/Doc.jsx

@@ -434,6 +434,13 @@ export default {
                         cb(null, makeMarkdownRenderer(doc));
                     }),
                 },
+                {
+                    label: 'Alert',
+                    path: '/docs/renderers/Alert',
+                    getComponent: (location, cb) => require(['../../docs/renderers/Alert.md'], (doc) => {
+                        cb(null, makeMarkdownRenderer(doc));
+                    }),
+                },
                 {
                     label: 'Action',
                     path: '/docs/renderers/Action',