Add support for SAHI

[danielruijs]

https://github.com/obss/sahi

https://colab.research.google.com/github/obss/sahi/blob/main/demo/inference_for_huggingface.ipynb#scrollTo=hm6dQUFj5t2J

[danielruijs]

Train using sliced images https://github.com/obss/sahi/blob/main/docs/cli.md#coco-slice-command-usage

sahi coco slice --image_dir dir/to/images --dataset_json_path dataset.json