- Add data_SemEval/ annotations, questions, and their HF-viewer JSON conversions (annotations_hf, questions_hf) for 17 new language-culture pairs
- Add semeval-annotations and semeval-questions dataset configs
- Add `semeval` split to multiple-choice-questions config (fixes Chinese_Singapore -> Mandarin_Singapore naming)
- Update annotations for Northern Nigeria, UK, and US (both raw and _hf JSON)
- Update README: new configs, changelog entry, language tags, and codes table