transformers safetensors qwen2 text-generation mergekit merge conversational arxiv:2306.01708 base_model:Qwen/Qwen2-7B base_model:merge:Qwen/Qwen2-7B base_model:Weyaxi/Einstein-v7-Qwen2-7B base_model:merge:Weyaxi/Einstein-v7-Qwen2-7B autotrain_compatible text-generation-inference endpoints_compatible region:us