Silverblue Asahi Image Builder

I would recommend runnning:

dnf copr enable @osbuild/osbuild
dnf install osbuild osbuild-ostree osbuild-tools

before you hack on this, and get the latest version of osbuild.

I also regret naming this repo wth Silverblue, feel free to alter the scripts so we can build Kinoite and Silverblue.