docs(*): update a11y docs

docs/tag/demo/accessibility.md

@@ -0,0 +1,50 @@
+# 无障碍
+
+- order: 3
+
+组件已支持无障碍。关于键盘操作请参考`ARIA and KeyBoard`。
+
+
+:::lang=en-us
+# Accessibility
+
+- order: 3
+
+Components already support accessibility.Please refer to `ARIA and KeyBoard` for keyboard operation.
+
+:::
+---
+
+````jsx
+import { Tag, Icon } from '@alifd/next';
+
+const {Group: TagGroup} = Tag;
+
+
+const dataType = ['全部', '衣服', '手机', '化妆品'];
+
+
+class Demo extends React.Component {
+
+    constructor(props) {
+        super(props);
+        this.state = {
+            name:''
+        };
+        this.onclick = this.onclick.bind(this);
+    }
+    onclick(v) {
+        this.setState({name: v.item});
+    }
+    render() {
+        return (<div>
+            <TagGroup>
+                {dataType.map(item => <Tag type="normal" key={item} size="medium"  onClick={() => this.onclick({item})} >{ item }</Tag>) }
+            </TagGroup>
+            {this.state.name}
+        </div>);
+    }
+}
+ReactDOM.render(<Demo />, mountNode);
+
+````