transformers safetensors idefics2 pretraining multimodal lmm vlm llava siglip llama3 mantis en dataset:TIGER-Lab/Mantis-Instruct arxiv:2405.01483 base_model:HuggingFaceM4/idefics2-8b base_model:finetune:HuggingFaceM4/idefics2-8b license:apache-2.0 endpoints_compatible region:us