[rust-server] no example of how to string clients and servers together

Created by: bjgill

Description

One of the key features of rust-server is that you can straightforwardly string clients and servers together. It's quite sad that we don't actually provide any docs/examples as to how you do this.

openapi-generator version

OpenAPI declaration file content or url

Command line used for generation

Steps to reproduce

Related issues/PRs

Seen in https://github.com/OpenAPITools/openapi-generator/issues/1199#issuecomment-428260323

Suggest a fix/enhancement

I think we should be able to add a fairly simple example that acts as both client and server for the same API to demonstrate how to plug the two together.