Description of Change

On a recent macios workload, a regression caused issues with WeakReferences bringing lots of crashes in our app, all tied to KVOs.

So, once again I felt the fragility of key-value-observers.

This PR introduces an .xcframework for Apple platforms which could really help in the future also for other purposes.

For now, I swizzled CALayer.setBounds methods and added a new platformAutoresizingMask property.

This enables us to do things like:

void IAutoSizableCALayer.AutoSizeToSuperLayer()
{
	Frame = SuperLayer?.Bounds ?? throw new InvalidOperationException("SuperLayer should be set before invoking AutoSizeToSuperLayer");

	this.SetAutoresizeMask(UIViewAutoresizing.FlexibleDimensions);
}

Where the extension method is simply doing:

internal static void SetAutoresizeMask(this CALayer layer, UIViewAutoresizing mask)
{
    layer.SetValueForKey(NSObject.FromObject(mask), new NSString("platformAutoresizingMask"));
}

... I could have added ApiDefinition.cs C# binding, but I didn't want to expose those symbols publicly.

Security

For security concerns, the MAUI team should use the attached script to re-build the .xcframework and commit that on my behalf like we did with Android in the past.

This is how the project looks like: