Feature Request: macOS Support

[Saadnajmi]

Hello! I noticed this library doesn't have macOS support yet. I think there are some parallels (Header -> Window Header, Screen -> An NSView presented from a sidebar or something). Adding support for this would also be a great boon to helping more React Native apps be cross platform, since this library is heavily used :)

I came across this because there are a few test apps of other libraries (react-native-skia) for example that use RNScreens, so to port that library's test app on macOS, I have gotten stuck / forked the code.

I'd be willing to also submit a PR myself, though it might take me a while. The last I checked, there was a lot of UIKit code in this repo, so simple ifdefs may not suffice. Maybe a small limited implementation just to unblock support? I'll have to investigate.

[kkafar]

@Saadnajmi We dropped idea of macOS support some time ago as the macOS does not natively support stack-navigation paradigm and using screens there would not effectively bring any advantages to using plain views. I can see some value of making screens work there anyway, as this would allow easier app-porting, however I've never given it much more thought. I'll be happy, however to discuss & guide in case you find time to open a PR and work on this feature.

[Saadnajmi]

Makes sense! I also realize you have the enableScreens bool you export, so perhaps I can be unblocked by just disabling it for macOS