transformers safetensors qwen2 text-generation merge mergekit lazymergekit Qwen/Qwen2-1.5B-Instruct conversational base_model:Qwen/Qwen2-1.5B-Instruct base_model:finetune:Qwen/Qwen2-1.5B-Instruct autotrain_compatible text-generation-inference endpoints_compatible region:us