transformers safetensors qwen2 text-generation mergekit merge conversational arxiv:2306.01708 base_model:Qwen/Qwen1.5-1.8B-Chat base_model:merge:Qwen/Qwen1.5-1.8B-Chat base_model:vilm/Quyen-Mini-v0.1 base_model:merge:vilm/Quyen-Mini-v0.1 autotrain_compatible text-generation-inference endpoints_compatible region:us