Following ZIO tutorial at https://scalac.io/blog/write-command-line-application-with-zio/, using ZIO 1.0.0-RC16 and Scala 2.13.8.
I gave up on Scala 3 and ZIO 2.0.0-RC2 for this zio kata because of all of the incompatibilities. I'll jump back to Scala3/ZIO2 exclusively after completing this tutorial.