transformers gguf mergekit merge base_model:Lambent/qwen2.5-lumen-rebased-14B base_model:merge:Lambent/qwen2.5-lumen-rebased-14B base_model:Qwen/Qwen2.5-14B-Instruct base_model:merge:Qwen/Qwen2.5-14B-Instruct endpoints_compatible region:us conversational