Fix task_categories: drop invalid tags, add keypoint-detection

Add HF WebDataset quickstart notebook

Update README: add agents quickstart section

Style: remove em dashes

Add conversion and verification scripts

Publication-ready README: reproducibility scripts, call for interest via Discussions/GitHub issues

Add sample-tier WebDataset shards (5 subjects): views, scene_mesh, flame_params

Add preview thumbnails

Add dataset card

initial commit