transformers gguf mergekit merge base_model:NeverSleep/Lumimaid-v0.2-12B base_model:merge:NeverSleep/Lumimaid-v0.2-12B base_model:nbeerbower/mistral-nemo-gutenberg-12B-v4 base_model:merge:nbeerbower/mistral-nemo-gutenberg-12B-v4 endpoints_compatible region:us conversational