transformers safetensors qwen2 text-generation mergekit merge conversational arxiv:2306.01708 base_model:Qwen/Qwen2.5-7B-Instruct base_model:merge:Qwen/Qwen2.5-7B-Instruct base_model:Qwen/Qwen2.5-Coder-7B-Instruct base_model:merge:Qwen/Qwen2.5-Coder-7B-Instruct autotrain_compatible text-generation-inference endpoints_compatible region:us