Implement a player select screen

[Piturnah]

The player select screen should have the following functionality:

• Four empty cells with a prompt to press a key or controller button.
• When a button is pressed, the empty cell becomes a player sprite preview.
• There should be a button to start the game.

All UI must be controller friendly.

Extra scope

Eventually, players should be able to choose their fishy avatar in this screen, but this may not be necessary for the first iteration (MVP version) of the feature.

Notes

Investigate kayak_ui