feat(jin-frame): runtime URL override, inheritance metadata fix, README rewrite (v5.1.0)

[imjuni]

Summary

• feat: JinFrameRequestConfig에 host, pathPrefix, path 추가 — _execute() 호출 시 데코레이터 값을 런타임에 오버라이드 가능
• fix: getFieldMetadata에서 Reflect.getOwnMetadata → Reflect.getMetadata로 변경, 상속 시 부모 클래스 필드 메타데이터 누락 버그 수정
• docs: README 전면 재작성 — v5.x 기준 반영, Naming Convention 링크, 데코레이터 표, Inheritance/Runtime URL Override 섹션 추가
• chore: lint:silent, test:silent npm 스크립트 추가 및 pre-commit hook에 적용

Test plan

• 488 tests passing
• Runtime URL override: host / pathPrefix / path / all-three cases
• Inheritance metadata: parent fields visible in child
• Override test: child decorator takes precedence over parent for same field

🤖 Generated with Claude Code

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (f40b941) to head (f931518).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

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  Coverage   100.00%   100.00%           
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  Files          107       107           
  Lines         1089      1089           
  Branches       293       293           
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  Hits          1089      1089           

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