### Check existing issues - [x] I've verified that this request isn't described by any existing issues. ### Request Migrate to the Linter Service as implemented at https://github.com/canonical/craft-application/issues/782 * All linters are implementations of the Craft Application class * The lint command uses the LinterService * Any other uses of linters use the LinterService ### The problem it solves Snapcraft and Charmcraft lint snaps and charms respectively at the end of the lifecycle. These linters don’t share common code and don’t have a similar UX. Additionally, there isn’t a way to add linters to other *craft apps without significant code duplication. Supersedes #5542