transformers safetensors gemma2 text-generation mergekit merge conversational arxiv:2403.19522 base_model:AALF/gemma-2-27b-it-SimPO-37K-100steps base_model:merge:AALF/gemma-2-27b-it-SimPO-37K-100steps base_model:djuna/G2-BigGSHT-27B-calc base_model:merge:djuna/G2-BigGSHT-27B-calc base_model:unsloth/gemma-2-27b-it base_model:merge:unsloth/gemma-2-27b-it model-index autotrain_compatible text-generation-inference endpoints_compatible region:us