Remove empty dependencies field from package.json. Add JSDoc to
CalendarEngine.toGregorian clarifying null-return contract. Fix
documentation style in source comments and wiki (no em dashes).
Tighten test output format in test.mjs and test-cjs.cjs.
Zero-dependency Hijri calendar engine with pluggable calendar registry.
Built-in Umm al-Qura (UAQ) and FCNA/ISNA calendar engines. Supports N
additional calendars via registerCalendar(). Pure Date.UTC arithmetic,
binary search on 184-entry UAQ table, Meeus Ch.49 new moon formula for
FCNA. 39 ESM + 20 CJS tests passing. Dual CJS/ESM build with full TypeScript
declarations.
