cmd: Add 'version' option #853

Job	Run time
test (arch)	1m 4s
Check DockerHub secrets exist	1s
test (bookworm)	58s
test (trixie)	58s
Build Docker container	24m 3s
Run unit tests	2m 2s
recipes on nofakemachine	38s
templating on nofakemachine	37s
debian (amd64) on nofakemachine	1m 3s
recipes on qemu	58s
templating on qemu	42s
partitioning on qemu	55s
msdos partitioning on qemu	58s
debian (amd64) on qemu	6m 43s
recipes on uml	2m 38s
templating on uml	44s
partitioning on uml	1m 35s
msdos partitioning on uml	59s
debian (amd64) on uml	5m 28s
recipes on kvm	34s
templating on kvm	47s
partitioning on kvm	37s
msdos partitioning on kvm	39s
debian (amd64) on kvm	3m 21s
debian (arm64) on kvm	2m 31s
debian (armhf) on kvm	2m 28s
arch on kvm	1m 36s
apertis on kvm	1m 50s
allgreen	1s
Publish to GHCR	0s
Publish to DockerHub	0s
	1h 7m 28s

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