transformers gguf merge mergekit lazymergekit WizardLM/WizardMath-7B-V1.1 meta-math/MetaMath-Mistral-7B en base_model:nachoaristimuno/MistralMath-7B-v0.1 base_model:quantized:nachoaristimuno/MistralMath-7B-v0.1 endpoints_compatible region:us