transformers gguf merge mergekit lazymergekit flemmingmiguel/MBX-7B flemmingmiguel/MBX-7B-v3 en base_model:flemmingmiguel/MBX-7B-v3 base_model:quantized:flemmingmiguel/MBX-7B-v3 license:apache-2.0 endpoints_compatible region:us imatrix