Format is missing in response

[andreperegrina]

Is your feature request related to a problem? Please describe.
I'm trying to add a file format to @return but there's no way to do it.

Describe the solution you'd like
I like to added format like is describe in the swagger doc
"application/vnd.ms-excel": { "schema": { "type": "string" "format": "binary" } }

https://swagger.io/docs/specification/describing-responses/#response-that-returns-a-file

[joelabrahamsson]

I would also like this feature and would be happy to create a PR for it. However, I'm not sure how the format should be represented in the JSDoc comments. Any guidance from the repo owners?