reorg folders, add MLP demo

feat: data collection script, explorer notebook, sample sessions

feat: add optional eye model (YOLO/MobileNet) alongside geometry

feat: stage 2 head pose, eye behaviour, MAR/yawn, tighter focus; add torch deps

chore: add template layout and stage 1 face mesh demo

Merge pull request #3 from k23172173/template-branch

set up template with folder structure and training script

first commit