Simplify README requirements

Add dataset and model contribution requirements

Update repository README overview

Restructure repo: only embodied_dataset + yolo_dataset at root

Deduplicate repo: keep single copy of embodied data and YOLO assets

Organize repo with embodied_dataset and yolo_data folders

Add Blue Bucket YOLOv8 model assets and documentation

Update dataset README

Update dataset README

Update dataset README

initial commit