Allow creating the VM with `utmctl`

Hey!

There currently exists a workaround to create the VM following these steps: https://blog.vkhitrin.com/creating-a-utm-virtual-machine-from-cli/ but it's very very cumbersome.

Would it be possible to extend the `utmctl` and add subcommand `create` which would take the ISO file and few flags?

I'm most interested in Linux virtualization with the `Enable Rosetta (x86_64 Emulation)` option at this case because it's the best way to cross-compile `x86_64-linux` from Apple silicon machines at the moment.