transformers gguf merge mergekit lazymergekit mistralai/Mistral-7B-v0.1 flemmingmiguel/MBX-7B-v3 en base_model:JDWebProgrammer/Mistral-MBX-7B-slerp base_model:quantized:JDWebProgrammer/Mistral-MBX-7B-slerp license:openrail endpoints_compatible region:us