run directly as EFI app

[orangecms]

The code could be taken in part to run directly as an EFI app, so you could use the x86 EFI target (Rust supports that now :)) and run it in QEMU directly in combo with OVMF.

Roughly, this should do:

qemu-system-x86_64 -kernel ems-for-uefi -bios OVMF.fd -nographic

taken from #2.