Adds a LICENSE file releasing the repository under CC BY-NC-ND 4.0
with an explicit carve-out forbidding commercial use, derivative
redistribution, and use of any content or dataset for training,
fine-tuning, or benchmarking commercial AI/ML models. Adds a
research-only license banner directly under the README header so
the terms are visible to every visitor.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
