transformers safetensors stablelm text-generation mergekit merge conversational arxiv:2203.05482 base_model:baxtos/1-barbaxtensv-1807 base_model:merge:baxtos/1-barbaxtensv-1807 base_model:baxtos/2-barbax-1807 base_model:merge:baxtos/2-barbax-1807 autotrain_compatible endpoints_compatible region:us