Ability to generate .http files from zio-http Endpoint defenitions

[987Nabil]

.http files are simple request descriptions, which are useful for testing.

See zio/zio-http#2876

And the intellij post for the same feature in spring.

This would be a very nice feature for zio-http.

[hmemcpy]

Ah, a very cool suggestion! Unfortunately, I don't have much time recently to take on new features, but I'd love a PR!
And would be happy to help if I can.
Thank you!