[Feature request] Add refact model

[bonswouar]

Would it be possible to add support for Refact model (released on September 4th)? https://huggingface.co/smallcloudai/Refact-1_6B-fim

Apparently it has much better results than StableCode, and as far as I understand it might even be lower on ram (1.6B vs 3B model)

Thanks for this great project btw! It's impressive how each month there are new models with even better results and (sometimes) lower hardware requirements, I hope at some point we'll be able to have some as good as GPT-4 models self-hosted on "normal" hardware :)