transformers gguf merge mergekit lazymergekit Nexusflow/Starling-LM-7B-beta mistralai/Mistral-7B-Instruct-v0.2 en base_model:allknowingroger/NexusMistral2-7B-slerp base_model:quantized:allknowingroger/NexusMistral2-7B-slerp license:apache-2.0 endpoints_compatible region:us conversational