refactor: move qemu to its own package
tests: implements end to end tests for the convert command with the following images: alpine:3.17, ubuntu:20.04, debian:11, centos:8
Signed-off-by: Adphi <philippe.adrien.nousse@gmail.com>
set user permissions on image if run with sudo or in docker
run/vbox & run/hetzner: run qemu-img in docker if not available in path
Signed-off-by: Adphi <philippe.adrien.nousse@gmail.com>