🚧✨ Initial streaming text generation through streaming endpoint

[evaline-ju]

Adds basic streaming text generation to the streaming classification endpoint

Note: detections are not enabled yet, and start_index and processed_index will have to be updated

For: #44

[gkumbhat]

We need to iterate on a few things w.r.t to channel etc, but this is a good start and would allow us to work on a couple of pieces in parallel.

Thanks Evaline!

[evaline-ju]

We need to iterate on a few things w.r.t to channel etc, but this is a good start and would allow us to work on a couple of pieces in parallel.

Agreed, thus the "initial" and 🚧 in the PR name