Add links to paper, project page, and code (#1)

Update README.md

model card: exact training details (250k steps, adapter rank 0), dataset link

license: apache-2.0

model card: self-contained inference via bundled norm stats

add norm_stats_delta.json (required for inference/eval)

add model card

FACT RoboTwin checkpoint (failure-cotrained, 250k steps)

initial commit