transformers safetensors mistral text-generation mergekit merge code-assistant personality conversational arxiv:2203.05482 base_model:Nondzu/Mistral-7B-Instruct-v0.2-code-ft base_model:merge:Nondzu/Mistral-7B-Instruct-v0.2-code-ft base_model:cognitivecomputations/samantha-1.2-mistral-7b base_model:merge:cognitivecomputations/samantha-1.2-mistral-7b autotrain_compatible text-generation-inference endpoints_compatible region:us