TransferPicker 穿梭选择器

在穿梭器（Transfer）的基础上扩充了弹窗选择模式，展示值用的是简单的 input 框，但是编辑的操作是弹窗个穿梭框来完成。

```schema: scope=”body” { “type”: “form”, “api”: “/api/mock2/form/saveForm”, “body”: [ { “label”: “组合穿梭器”, “type”: “transfer-picker”, “name”: “a”, “sortable”: true, “selectMode”: “tree”, “searchable”: true, “options”: [ { “label”: “法师”, “children”: [ { “label”: “诸葛亮”, “value”: “zhugeliang” } ] }, { “label”: “战士”, “children”: [ { “label”: “曹操”, “value”: “caocao” }, { “label”: “钟无艳”, “value”: “zhongwuyan” } ] }, { “label”: “打野”, “children”: [ { “label”: “李白”, “value”: “libai” }, { “label”: “韩信”, “value”: “hanxin” }, { “label”: “云中君”, “value”: “yunzhongjun” } ] } ] } ] }

## 自定义选项展示
```schema: scope="body"
{
    "type": "form",
    "body": [
      {
        "label": "默认",
        "type": "transfer-picker",
        "name": "transfer",
        "menuTpl": "<div class='flex justify-between'><span>${label}</span><span class='text-muted m-r text-sm'>${tag}</span></div>",
        "valueTpl": "${label}(${value})",
        "options": [
          {
            "label": "诸葛亮",
            "value": "zhugeliang",
            "tag": "法师",
          },
          {
            "label": "曹操",
            "value": "caocao",
            "tag": "战士",
          },
          {
            "label": "钟无艳",
            "value": "zhongwuyan",
            "tag": "战士",
          },
          {
            "label": "李白",
            "value": "libai",
            "tag": "打野"
          },
          {
            "label": "韩信",
            "value": "hanxin",
            "tag": "打野"
          },
          {
            "label": "云中君",
            "value": "yunzhongjun",
            "tag": "打野"
          }
        ]
      }
    ]
}

属性表

更多配置请参考穿梭器（Transfer）。

事件表

当前组件会对外派发以下事件，可以通过onEvent来监听这些事件，并通过actions来配置执行的动作，在actions中可以通过event.data.xxx事件参数变量来获取事件产生的数据，详细请查看事件动作。

动作表

当前组件对外暴露以下特性动作，其他组件可以通过指定actionType: 动作名称、componentId: 该组件id来触发这些动作，动作配置可以通过args: {动作配置项名称: xxx}来配置具体的参数，详细请查看事件动作。