Support for sharing ResultBackNavigator between nested destinations about compose-destinations

[raamcosta]

HI!

Thanks for opening the issue!
This seems similar to sharing outer NavControllers: I would create a new class that holds the ResultBackNavigator and this way you can send it via dependency:

class ParentBackNavigator(navigator: ResultBackNavigator<Boolean>): ResultBackNavigator<Boolean> by navigator

@Composable
fun BottomSheet(
  resultBackNavigator: ResultBackNavigator<Foo>,
) {
  DestinationsNavHost(
    dependenciesContainerBuilder = {
        dependency(ParentBackNavigator(resultBackNavigator))
    }
  )
}

@Composable
@Destination
fun InnerScreen1(
    backNavigator: ParentBackNavigator
) {
    /* some callback */ {
        backNavigator.navigateBack(result = true)
    }
}

[Ezard]

Ahh, I didn't realise that this was possible - this is super neat, thanks!