[intersection-observer] deprecated된 intersection-observer 패키지를 제거합니다.

[dongoc]

PR 설명

기존에 사용하던 @titicaca/intersection-observer 커스텀 패키지를 제거하고, react-intersection-observer 라이브러리로 교체합니다.

변경 이유

• @titicaca/intersection-observer 패키지는 @titicaca/react-intersection-observer와 intersection-observer 폴리필을 감싸는 래퍼 패키지였습니다.
• 현재 대부분의 브라우저에서 IntersectionObserver를 네이티브로 지원하므로 폴리필이 불필요해졌습니다.
• react-intersection-observer는 더 활발히 유지보수되고, 더 간결한 API를 제공합니다.

변경 내역

1. @titicaca/intersection-observer 패키지 삭제

• packages/intersection-observer/ 디렉토리 전체 삭제
• README, package.json, 소스 코드, 설정 파일 등 모두 제거

2. 의존성 변경

• tds-ui, tds-widget, triple-document 패키지에서 @titicaca/intersection-observer 의존성 제거
• react-intersection-observer (^9.13.1) 의존성 추가

3. 컴포넌트 마이그레이션

react-intersection-observer의 InView 컴포넌트와 useInView 훅으로 교체:

4. 기타 변경

• date-divider.tsx: chromatic-ignore 클래스 추가
• day-picker.stories.tsx: Chromatic 스냅샷 비활성화 설정 추가

관련 문서

• jira: NACS-869
• react-intersection-observer 공식 문서

[codecov]

Codecov Report

❌ Patch coverage is 3.33333% with 58 lines in your changes missing coverage. Please review.
✅ Project coverage is 12.82%. Comparing base (4aa7484) to head (2e6e4d1).
⚠️ Report is 4 commits behind head on v15.

Files with missing lines	Patch %	Lines
...tds-widget/src/ad-banners/horizontal-list-view.tsx	0.00%	12 Missing ⚠️
...es/tds-widget/src/image-carousel/video-content.tsx	0.00%	7 Missing ⚠️
.../src/recommended-contents/recommended-contents.tsx	0.00%	7 Missing ⚠️
...c/review/components/review-element/media/video.tsx	0.00%	7 Missing ⚠️
...get/src/review/components/review-element/index.tsx	0.00%	3 Missing and 1 partial ⚠️
...ages/tds-ui/src/components/image/optimized-img.tsx	25.00%	2 Missing and 1 partial ⚠️
.../poi-detail/recommended-articles/article-entry.tsx	0.00%	3 Missing ⚠️
.../review/components/infinite-list/infinite-list.tsx	0.00%	2 Missing and 1 partial ⚠️
...s/tds-ui/src/components/carousel/carousel-item.tsx	33.33%	1 Missing and 1 partial ⚠️
...ages/tds-widget/src/ad-banners/vertical-entity.tsx	0.00%	2 Missing ⚠️
... and 4 more

Additional details and impacted files

@@            Coverage Diff             @@
##              v15    #3782      +/-   ##
==========================================
- Coverage   12.88%   12.82%   -0.07%     
==========================================
  Files         809      805       -4     
  Lines       11905    11861      -44     
  Branches     4153     4140      -13     
==========================================
- Hits         1534     1521      -13     
+ Misses       9877     9848      -29     
+ Partials      494      492       -2     

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[dongoc]

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