transformers gguf code codeqwen chat qwen qwen-coder text-generation en arxiv:2409.12186 arxiv:2309.00071 arxiv:2407.10671 base_model:Qwen/Qwen2.5-Coder-7B base_model:quantized:Qwen/Qwen2.5-Coder-7B license:apache-2.0 endpoints_compatible region:us conversational