[Idea] Handle utf-8 in keyboard for highscore input #16
Description
For now, we can only input ascii characters (the letters displayed are from the image in https://github.com/petitlapin/Li-Ri-devel/blob/main/langues/lettres.png).
It would be nice to use SDL_ttf to display the texts (and it should allow to use utf-8 characters).
Idea splitted from #13