Add `suggestName` method to `HasTarget` #1289

Job	Run time
ci (ubuntu-22.04, 8, 2.13.12, 2.4) / Formatting	59s
ci (ubuntu-22.04, 8, 2.13.12, 2.4) / ci	14m 4s
ci (ubuntu-22.04, 8, 2.13.12, 2.4) / compile project with mill	3m 18s
ci (ubuntu-22.04, 8, 2.13.12, 2.4) / Integration Tests	9m 5s
ci (ubuntu-22.04, 8, 2.13.12, 2.4) / Standard Library Tests (2.13.12)	2m 7s
ci (ubuntu-22.04, 8, 2.13.12, 2.4) / Build Mdoc & Website	6m 0s
ci (ubuntu-22.04, 8, 2.13.12, 2.4) / Test Scala-CLI Template / Build and Test	2m 30s
check tests	1s
all tests passed	4s
Deploy Website	0s
publish	0s
	38m 8s

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