New Model Refact Code 1.6B for code

[forrackun]

https://refact.ai/blog/2023/introducing-refact-code-llm/

[Green-Sky]

their previous blog post is a good explanation for their choices (alibi, lion, gqa...)
https://refact.ai/blog/2023/applying-recent-innovations-to-train-model/

[Jipok]

ggml-org/llama.cpp#3013

[Green-Sky]

tracking issue: ggml-org/llama.cpp#3061