Spring-ai Add structured response for Azure AudioTranscription

Motivation

For the Azure AudioTranscription, we need to obtain a structured response in the verbose_json response format. Currently, it is not being returned.

Description

I have introduced a core, general-purpose StructuredResponse to handle a detailed response (verbose_json).

I've assumed that the data are associated with ResponseMetadata. I'm also considering using ResultMetadata, but I'm not sure which is a better fit? @tzolov and @markpollack do you have any thoughts on this?

Comment From: piotrooo

Gently pinging @tzolov and @markpollack, as we need this for one of our project :pray:

Comment From: markpollack

Thanks, we feel behind and catching up now.