关于添加新 feature 的提议

功能描述：提供一种页面的分离能力，类似 ```embed``` 或者 ```iframe``` 这样的 html 标签。

demo 展示：https://github.com/hanliuxin5/ControllerView

待解决问题：如果此提议有实际价值的话，那么目前的 Android 端编码是相当随意的，需要进行代码的功能性重构，而且 iOS 端的实现也需要考虑。

Start by reviewing the existing Android implementation and the linked ControllerView demo to understand the proposed page-separation behavior, then assess how an iOS implementation would fit. Done would require a defined feature scope, a functional Android implementation, and an agreed approach for iOS.

Written by the indexing model from the issue text.