transformers mpt text-generation Composer MosaicML llm-foundry custom_code dataset:jeffwan/sharegpt_vicuna dataset:Hello-SimpleAI/HC3 dataset:tatsu-lab/alpaca dataset:Anthropic/hh-rlhf dataset:victor123/evol_instruct_70k arxiv:2205.14135 arxiv:2108.12409 arxiv:2010.04245 license:cc-by-nc-sa-4.0 autotrain_compatible text-generation-inference region:us