Lint

Extract shared image utilities to reduce duplication #1240

Job	Run time
build (3.13, ubuntu-latest, pre-push)	1m 14s
build (3.13, windows-latest, manual)	1m 16s
build (3.13, windows-latest, pre-commit)	1m 33s
build (3.13, windows-latest, pre-push)	2m 43s
build (3.13, ubuntu-latest, manual)	36s
build (3.13, ubuntu-latest, pre-commit)	34s
completion-lint	5s
	8m 1s

Provide feedback