transformers gguf code codeqwen chat qwen qwen-coder autoquant text-generation en arxiv:2409.12186 arxiv:2407.10671 base_model:Qwen/Qwen2.5-Coder-3B base_model:quantized:Qwen/Qwen2.5-Coder-3B license:other endpoints_compatible region:us conversational