Auto-collect schema references for IntoResponses-style responses

[plv]

Hi, thanks for all the hard work on utoipa!

In #1071 I see you added auto collection of tuple responses for utoipa::path if the responses are tuple-style (i.e. responses((status = 200, description = "200", body = FooStruct)), but that IntoResponses-style (i.e. responses(FooStruct)) is not supported.

What happens is that if the response is a struct with named fields has nested structs (with their own respective ToSchema implementations), there will be hanging $refs that are not included. My current workaround is to force inlining with #[schema(inline)] on these fields, but I'd much prefer if the $refs were automatically collected

Is this a misuse/misunderstanding of IntoResponses? Or will rescursive and automatic components/$ref collection be implemented for IntoResponses in the future?

Thanks again!