gguf alignment-handbook dpo trl selm text-generation dataset:HuggingFaceH4/ultrafeedback_binarized base_model:ZhangShenao/SELM-Llama-3-8B-Instruct-iter-2 base_model:quantized:ZhangShenao/SELM-Llama-3-8B-Instruct-iter-2 license:mit region:us