Support reasoning in streaming API

[natanfudge]

Currently StreamFrame does not appear to recognize reasoning messages in a any meaningful way, this is evidenced by the fact toMessageResponses will never construct reasoning messages.
Considering long reasoning traces (i.e. long waiting times with no response) are the primary motivating factor for using the streaming API, StreamFrame and its surrounding APIs should recognize reasoning messages.

[aozherelyeva]

Hi @natanfudge, thank you for the proposal!

Please feel free to follow the issue in our YouTrack. I will get back to you once we have more information on the progress :)

Have a great day!

[aozherelyeva]

Apparently @tiginamaria is working on this issue right now. So we'll provide you with some updates soon :)