gguf salesforce llama llama-3 instruct finetune imatrix importance matrix text-generation arxiv:2405.07863 arxiv:2312.11456 base_model:Salesforce/LLaMA-3-8B-SFR-Iterative-DPO-R base_model:quantized:Salesforce/LLaMA-3-8B-SFR-Iterative-DPO-R license:cc-by-nc-nd-3.0 region:us