docs(hf): add Spaces YAML metadata

Integrate L2CS-Net gaze estimation

MERGE EVERYTHING from feature/integration-cleaned :((((((((((((((((((((((((((((((((((((((((((((((( so tired

evaluation: channel ablation script + feature importance LOPO

refactor: single checkpoints/ dir, fix uvicorn cmd and hybrid config path

Put all the models together (expect UI)

reorg folders, add MLP demo

set up template with folder structure and training script

first commit