gguf alignment-handbook generated_from_trainer quantized GGUF quantization imat imatrix static 16bit 8bit 6bit 5bit 4bit 3bit 2bit 1bit text-generation base_model:AI-MO/NuminaMath-7B-TIR base_model:quantized:AI-MO/NuminaMath-7B-TIR license:apache-2.0 region:us conversational