feat: add Qalb native Arabic code (ar/validation)

feat: add Qalb native Arabic code (ar/train)

docs: fix CITATION.cff url to match repo, set correct type (#6)

docs: add citation, limitations section, update condition references (#5)

docs: add comprehensive README with schema, source breakdown, and usage examples

feat: add Chinese native code dataset (3,486 files from 5 sources)

Update dataset card: fix languages (am → es), add experiments link (#1)

init: create README.md

initial commit