_AVKit_SwiftUI cross-import overlay

A cross-import overlay that bridges AVKit and SwiftUI, exposing the VideoPlayer view for use in SwiftUI layouts. Use VideoPlayer to display the audiovisual contents of an AVPlayer with system-provided playback controls. The overlay declares no types of its own; it adds SwiftUI integration to AVKit's playback APIs across iOS, macOS, tvOS, watchOS, and visionOS.