gguf alignment-handbook trl sft generated_from_trainer ggml quantized text-generation dataset:masakhane/african-ultrachat dataset:israel/untrachat_en base_model:masakhane/zephyr-7b-gemma-sft-african-ultrachat-200k base_model:quantized:masakhane/zephyr-7b-gemma-sft-african-ultrachat-200k license:gemma region:us