feat: add multi-window support

[okwasniewski]

Summary:

This PR adds multi-window support with data sharing from React Native to SwiftUI.

Changes

• XR.requestSession now accepts additional object which can be retrieved from the SwiftUI side.

New

• WindowManager API

Example usage:

constsecondWindow=WindowManager.getWindow('SecondWindow');constExample=()=>{return(<Viewstyle={styles.container}><Buttontitle="Open Second Window"onPress={()=>{secondWindow.open({title: 'React Native Window'});}}/><Buttontitle="Update Second Window"onPress={()=>{secondWindow.update({title: 'Updated Window'});}}/><Buttontitle="Close Second Window"onPress={()=>{secondWindow.close();}}/></View>);};

This design allows other platforms to adapt this pattern and extend the returned window object instead of adding more static methods on theWindowManager object

Changelog:

[VISIONOS] [ADDED] - Multi window support

Test Plan:

CI Green / Test multi window apis

[billyjacoby]

I’m really excited about this PR - if there’s anything I can contribute to help get this in please ping me!

[okwasniewski]

This solution is not ideal but I didn't find anything better that's available publicly.

I found private API that allows to retrieve "key" window scene (the last interacted with), but usage of private APIs is not allowed.

I'm leaving this for reference:

SEL isKeyWindowSceneSelector = NSSelectorFromString(@"_isKeyWindowScene");
if ([windowScene respondsToSelector:isKeyWindowSceneSelector]) {
BOOL isKeyWindowScene = [windowScene performSelector:isKeyWindowSceneSelector];
if (!isKeyWindowScene) {
continue;
}
}

[matthargett]

Post on the Apple dev forums and see if you can get an official response, some folks have gotten private iOS APIs made public via discussions there.

[okwasniewski]

[Question] How can we make declaring new windows possible without users touching native code?