[FEATURE] Support HTTPStatus

Is your feature request related to a problem

We typically use HTTPStatus in our code. When used as a value for status_code in path functions this results in the string literal in the documentation and when “trying” the response is shown as undocumented because it doesn’t match the actual response code

The solution you would like

I want to use HTTPStatus enum values and have it work exactly like the starlette.status pseudo enum values

[hmvp]

Works as expected 👍

[tiangolo]

Cool, thanks!

Yeah, I would accept a PR checking if a status code is an enum to get its value first. 🤓 ✔️