Destructure use_react_native! parameters and doc (#34177)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/34177

This Diff destructures the parameters of the use_react_native! function. It does that in a backward compatible way, so we there should be no disruptions.

It also adds documentation to the various public method we want to export to our users.

## Changelog
[iOS][Changed] - Destruct use_reactnative parameters and ad ddocumentation

Reviewed By: cortinico

Differential Revision: D37787365

fbshipit-source-id: 27f9030db2e8c6c66b9548b4c1287eb8165ae5fc