transformers safetensors llama text-generation mergekit merge conversational arxiv:2212.04089 base_model:NousResearch/Llama-2-7b-chat-hf base_model:merge:NousResearch/Llama-2-7b-chat-hf base_model:arcee-ai/llama_from_mistral_instruct_v2 base_model:merge:arcee-ai/llama_from_mistral_instruct_v2 autotrain_compatible text-generation-inference endpoints_compatible region:us