[Feature Request] MapProxy 和 DraftProxy 支持支持隐式查询

希望能支持以下语句
```java
select(a -> {
var proxy = new MapProxy();
proxy.put("s", a.children()); //children是oneToMany或manyToMany的导航属性
return proxy;
})
select(Select.Draft.of(
a.children()
))
```