transformers safetensors mistral text-generation merge mergekit lazymergekit Rakuten/RakutenAI-7B-chat lightblue/karasu-7B-chat-plus-unleashed ja en arxiv:2403.13257 base_model:Rakuten/RakutenAI-7B-chat base_model:merge:Rakuten/RakutenAI-7B-chat base_model:lightblue/karasu-7B-chat-plus-unleashed base_model:merge:lightblue/karasu-7B-chat-plus-unleashed autotrain_compatible text-generation-inference endpoints_compatible region:us