NavigationView integration

I'm not sure how this would work yet, but it would be great if the router either supported the native `NavigationView` and `NavigationLink` types or introduced new `RoutableNavigation` and `RoutableLink` (names to bikeshed) types that behaved in a similar way with support for `NavigationView` layout and transitions. Maybe it is supported already? I haven't had a chance to explore the source code yet, feel free to close this then.

Start by exploring the router source to determine whether native SwiftUI NavigationView and NavigationLink are already supported. Compare the existing behavior with the proposed RoutableNavigation and RoutableLink alternatives. The issue does not define a settled design or acceptance criteria, so the desired behavior would need clarification before implementation.

Written by the indexing model from the issue text.