[Request] Get current state

It would be helpful to have something like

Navigator.status()

to retrieve the current Navigation state

Also, is there currently a way to retrieve the initial Route when reloading? It doesn't seem like onAppear/onEnterTransitionComplete events are fired. Don't know if that's a bug or by design.

Start by tracing the Navigator API around the proposed Navigator.status() entry point and the onAppear/onEnterTransitionComplete events. Determine how current Navigation state and the initial Route on reload are exposed, then confirm that the behavior is defined for both normal navigation and reloads.

Written by the indexing model from the issue text.