Feature Request: Add Support for Presenting in a UIView Instead of UIWindow

[HassanTaleb90]

Hi 👋

Thank you for the great library!

I'd love to request a feature that allows presenting the SPIndicatorView in a specific UIView (like a view controller's view or a custom container), instead of only using a UIWindow.

This would be really helpful for apps that use custom presentation contexts, multiple scenes, or want more control over the indicator's hierarchy.

Something like:

indicatorView.present(in: someView, duration: 3.0)

Thanks again for your work!