feat: add switch

docs/examples/switch.md

@@ -0,0 +1,80 @@
+<script>
+export default {
+  data() {
+    return {
+      switchState: true
+    };
+  },
+  computed: {
+    switchStateText() {
+      return this.switchState ? 'ON' : 'OFF';
+    }
+  },
+  methods: {
+    updateState(newState) {
+      console.log('changing');
+      this.switchState = newState;
+    }
+  }
+};
+</script>
+<style lang="css">
+  @component-namespace page {
+    @component switch {
+      padding: 0 15px 15px;
+
+      @descendent sample {
+        margin: 0 15px;
+      }
+
+      @descendent text {
+        margin-right: 20px;
+      }
+    }
+  }
+</style>
+
+## Switch组件
+
+### 基础用法
+
+:::demo 样例代码
+```html
+<div class="page-switch">
+  <span class="page-switch-text">Switch state: {{switchStateText}}</span>
+  <o2-switch class="page-switch-sample" :checked="switchState" :onChange="updateState"></o2-switch>
+  <o2-switch class="page-switch-sample" :checked="false" :disabled="true"></o2-switch>
+</div>
+```
+
+
+```javascript
+export default {
+  data() {
+    return {
+      switchState: false
+    };
+  },
+  computed: {
+    switchStateText() {
+      return this.switchState ? 'on' : 'off';
+    }
+  },
+  methods: {
+    updateState(newState) {
+      console.log('changing');
+      this.switchState = newState;
+    }
+  }
+};
+```
+:::
+
+### API
+
+| 参数       | 说明      | 类型       | 默认值       | 可选值       |
+|-----------|-----------|-----------|-------------|-------------|
+| checked | 开关状态 | boolean  | false          | true,false    |
+| loading | loading状态 | boolean  | false          | true,false    |
+| disabled | 禁用状态 | boolean  | false          | true,false    |
+| onChange | 回调 | function  | function（）{}      | -    |