docs(jin-frame): fix :param → {param} URI template syntax; add URL Template page (RFC 6570)

[imjuni]

Summary

• :param → {param} 전면 수정: docs 전체(EN/KO)에 남아 있던 Express 스타일 path parameter 표기를 RFC 6570 URI Template 방식으로 통일

  • docs/index.md, docs/ko/index.md
  • docs/what-is-jin-frame.md, docs/ko/what-is-jin-frame.md
  • docs/getting-to-start.md, docs/ko/getting-to-start.md
  • docs/method/inheritance.md, docs/ko/method/inheritance.md
  • docs/method/authorization.md, docs/ko/method/authorization.md
  • docs/ko/usage-method.md, docs/ko/method/validation.md
  • docs/field/param.md (Quick Example 전체)

• URL Template 문서 신규 추가 (docs/method/url-template.md, docs/ko/method/url-template.md):

  • RFC 6570 스펙 링크 및 WHATWG URL Standard 참조
  • {variable} vs :variable 비교표
  • host, pathPrefix, path 모두 URI Template 적용됨 명시
  • 런타임 오버라이드 예시
  • 사이드바 등록 (Naming Convention 다음)

🤖 Generated with Claude Code

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (a3f9fa2) to head (847f741).
⚠️ Report is 2 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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