Turn the Configurator into a Godot app.

[Lazorne]

The goal is to turn Configurator into a controller usable menu with nice art.

[Lazorne]

OpenGamepadUI

https://github.com/ShadowBlip/OpenGamepadUI

This also might be something we can look into or collaborate with

[Lazorne]

WallK: It should be responsive enough to support all usual screen ratios

Apparently I can't assign WallK to this for some reason.

[WallK]

@Lazorne there's something wrong with my permissions, true

[XargonWan]

Continued in: https://github.com/RetroDECK/RetroDECK/issues/630