transformers gguf mergekit merge roleplay sillytavern gemma2 en base_model:TheDrummer/Gemmasutra-9B-v1 base_model:merge:TheDrummer/Gemmasutra-9B-v1 base_model:princeton-nlp/gemma-2-9b-it-SimPO base_model:merge:princeton-nlp/gemma-2-9b-it-SimPO endpoints_compatible region:us conversational