feat: add named dataset configs

docs: clarify dataset IDs and licensing

Upload README.md with huggingface_hub

Upload README.md with huggingface_hub

Upload README.md with huggingface_hub

Upload README.md with huggingface_hub

Highlight four key differentiators: unified format, clear provenance, parser-verified, eval-ready

Add search keywords: AIME, GSM8K, MATH-500, Omni-MATH, OlympiadBench, DAPO

Fix usage: use actual math-eval interface instead of fictional CLI

Fix Dataset Card: YAML metadata, add GitHub link, math-eval integration, dual BibTeX

Add Dataset Card with citations and usage

Upload canonical benchmark datasets