Development on sprout has thus far focused on technical feasibility, but now that it seems possible, it's time to implementing rendering of an enhanced boot menu!

For reference code on how it could be done, I'm thinking we look at systemd-boot for inspiration as their menu is super simple: https://github.com/systemd/systemd/blob/main/src/boot/boot.c

@kaniini also mentioned some thoughts on the boot menu that might require some changes to how entries work, specifically localization.