fix: #2 — feat(foundation): reference resolver with EN + ZH support

[MiaoDX]

Closes #2.

Parses a free-form scripture reference into a canonical Reference{Tradition, Work, Book?, Chapter, VerseStart, VerseEnd?} per plan.md §8.1.

What's in this PR

• internal/resolver/reference.go — Reference struct, tradition/work constants, *AmbiguousError, sentinel errors (ErrEmpty, ErrUnrecognized, ErrInvalidNumber, ErrInvalidRange)
• internal/resolver/resolve.go — Resolve(input string) (Reference, error) entry point + per-tradition dispatch + a tryMatchPrefix helper that uses an ASCII-letter boundary so "jo" won't beat "joel"
• internal/resolver/bible.go — full 66-book alias table (English canonical + common abbreviations + Simplified Chinese)
• internal/resolver/quran.go — ~12 popular surahs by name
• internal/resolver/numerals.go — Chinese numeral parser for 1..999 (一, 十, 十一, 二十, 八十一, 一百零一, 一百二十三 ...)
• internal/resolver/resolve_test.go — 50+ positive, 17 negative, 3 ambiguous, 19 numeral cases

Acceptance criteria mapping

• Parses Bible: John 3:16, Jn 3:16, 1 John 3:16, 约翰福音 3:16, 约翰一书 3:16
• Parses Tao Te Ching: dao 11, daodejing chapter 11, 道德经 11, 道德经第十一章
• Parses Heart Sutra: sutra heart, 心经, 般若波罗蜜多心经
• Parses Quran: Quran 2:255, 2:255, Surah Al-Baqarah 255
• Returns canonical Reference{Tradition, Work, Book?, Chapter, VerseStart, VerseEnd?}
• Ambiguous bare 3:16 returns *AmbiguousError with candidates (Quran + Bible-shape)
• Table-driven tests with ≥ 50 inputs across all 4 traditions, both languages, plus negatives

Design notes

• Per-tradition alias tables sorted by byte length descending so longer matches win — "1 john" beats "john", "约翰福音" beats "约".
• The ASCII-letter boundary in tryMatchPrefix is intentionally narrow: rejecting any letter would break CJK chains like "道德经第十一章" (CJK ideographs are letters by Unicode category). Longest-first sorting handles CJK ambiguity instead.
• Errors wrap the package sentinels with fmt.Errorf("%w: ...", ...) so callers can use errors.Is. *AmbiguousError is returned as a typed error so callers can use errors.As.

Verification

• go vet ./... clean
• staticcheck ./... clean
• go test ./... — internal/resolver and internal/schema both PASS

---

Generated by Claude Code