Split client into client and model

[mobiletoly]

currently when client (e.g. client.go) file is generated - it contains both Client functionality and generated models. I use hexagonal architecture and would be much more convenient for me to split this functionality into two different files.

[Yamashou]

@mobiletoly Can you give me the simplest example you can think of? I have yet to come up with an image 🙏.

[sonatard]

ref: https://github.com/99designs/gqlgen/issues/2555