mpii-to-yolopose

mpii format to yolopose format for using mpii data

desired format: class-index x y width height px1 py1 px2 py2 ... pxn pyn
current format: not that ^
Yolopose format: https://docs.ultralytics.com/datasets/pose/#ultralytics-yolo-format
for custom training yolov8-pose models

set up

directory structure
├── test # with images & json
├── test_output # output files (.txt in yolov8 format & image w/ tested annotations)