Translate/useEffect

[2duckchun]

Progress

• [x] 번역 초안 작성 (Draft translation)
• [x] 공통 스타일 가이드 확인 (Check the common style guide)
• [x] 모범사례 확인 (Check best practices)
• [x] 용어 확인 (Check the term)
• [x] 맞춤법 검사 (Spelling check)
• [x] 리뷰 반영 (Resolve reviews)

[github-actions[bot]]

Size changes

## 📦 Next.js Bundle Analysis for react-dev This analysis was generated by the [Next.js Bundle Analysis action](https://github.com/hashicorp/nextjs-bundle-analysis). 🤖 This PR introduced no changes to the JavaScript bundle! 🙌

[hg-pyun]

@2duckchun 님 코멘트 확인 부탁드려요~