-Wunused:nowarn compiler option

Scala 3.7 flags more unused implicit and explicit values as warnings. In some cases, this is intended on our part and we will need to annotate them with the `@nowarn` annotation. It would be nice to know if we are using the annotation where it is not needed.

If it is decided that it should be added I can submit a PR with it. I think it would go with the scala 3.3+ compiler options.