transformers safetensors transnormer text-generation  TransNormerLLM custom_code en zh arxiv:2307.14995 arxiv:2009.03300 base_model:OpenNLPLab/TransNormerLLM-7B base_model:quantized:OpenNLPLab/TransNormerLLM-7B license:other autotrain_compatible 4-bit gptq region:us