Gamepad menu navigation

[Trouv]

Try out bevy_ui_navigation for gamepad support. We may also want to alter the current UiAction API to support this, and maybe use the UI features of leafwing_input_manager as a replacement.

[Trouv]

Some thoughts on how to break this down:

NavigationPlugin

• provides leafwing ActionLike that wraps around NavRequest
• provides system mapping leafwing input to NavRequest writer

NavigatableActionPlugin\<A>

• generic parameter A for leafwing ActionLike
• provides system mapping activated buttons to their A

Other

• some component like "ButtonState" acting as a union of Focusable and Interaction (maybe third tiny plugin for this?)

PRs

• [x] ~refactor: update menus to use leafwing ActionLikes~
• [ ] feat: add NavigationPlugin
• [ ] feat: add ButtonStatePlugin
• [ ] feat: add NavigatableActionPlugin

[Trouv]

Okay, after trying for a little bit, that first PR may not be worth it. There's a couple issues with the ActionStateDriver that we need to use to use leafwing w/ UI buttons:

1. You can't use the ActionState as a resource
2. The button only works on_pressed, not on released (no changing your mind by dragging your mouse off the before unclicking)
3. Most importantly, the driver seems to use just the variant of the action you chose for it, rather than its exact value. For internal types, it seems to use the default implementation. So, when I give a button a ActionStateDriver { action: LevelSelectAction(LevelSelect::Index(18)), .. }, the actual action it performs is LevelSelectAction(LevelSelect::default())

I'll just continue to use UiAction for now. We should still be able to use leafwing for navigation input though