Is your feature request related to a problem? Please describe.

There is lack of server codegen for pretty popular scala http4s framework, it would be good to have one.

Describe the solution you'd like

Codegen targeted to modern http4s stack with circe as json library.

Describe alternatives you've considered

There is guardrail project with needed codegen, but guardrail project feels like to be abandoned, and it's current codeden lacks of needed possibilities. Also codebase of guardrail is pretty complex.

Additional context

Actually I would like to provide MR with http4s codegen with feature request.