Create live-image for Grit OS

bmallred 2083a1078b added base files and custom repository 10 ans auparavant
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archiso-x86_64-cd.conf 2083a1078b added base files and custom repository 10 ans auparavant
archiso-x86_64-usb.conf 2083a1078b added base files and custom repository 10 ans auparavant
uefi-shell-v1-x86_64.conf 2083a1078b added base files and custom repository 10 ans auparavant
uefi-shell-v2-x86_64.conf 2083a1078b added base files and custom repository 10 ans auparavant