0.1.0

• features:
• support re2js as regex engine: pass the RE2JS class directly ( auto-detected and wrapped ), or wrap explicitly with curegex.adapters.re2js(RE2JS)
• expose effective engine as curegex.re / curegex.tw.re ( defaults to native RegExp; follows engine(...) setting ) for building ad-hoc patterns with the same engine
• add test/: run all rules against native RegExp, re2 and re2js ( npm test )
• tweaks:
• pin node 22 with volta; upgrade re2 to 1.26.x
• tw han rule: use literal char range instead of \u escape for RE2-syntax compatibility