docs: translate React 19 (#1183)

# React 19 번역

Blog -> React 19 글을 번역하였습니다.

## 필수 확인 사항

- [x] [기여자 행동 강령 규약<sup>Code of
Conduct</sup>](https://github.com/reactjs/ko.react.dev/blob/main/CODE_OF_CONDUCT.md)
- [x] [기여
가이드라인<sup>Contributing</sup>](https://github.com/reactjs/ko.react.dev/blob/main/CONTRIBUTING.md)
- [x] [공통 스타일 가이드<sup>Universal Style
Guide</sup>](https://github.com/reactjs/ko.react.dev/blob/main/wiki/universal-style-guide.md)
- [x] [번역을 위한 모범 사례<sup>Best Practices for
Translation</sup>](https://github.com/reactjs/ko.react.dev/blob/main/wiki/best-practices-for-translation.md)
- [x] [번역 용어 정리<sup>Translate
Glossary</sup>](https://github.com/reactjs/ko.react.dev/blob/main/wiki/translate-glossary.md)
- [x] [`textlint` 가이드<sup>Textlint
Guide</sup>](https://github.com/reactjs/ko.react.dev/blob/main/wiki/textlint-guide.md)
- [x] [맞춤법 검사<sup>Spelling
Check</sup>](https://nara-speller.co.kr/speller/)

## 선택 확인 사항

- [ ] 번역 초안 작성<sup>Draft Translation</sup>
- [ ] 리뷰 반영<sup>Resolve Reviews</sup>

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Co-authored-by: 루밀LuMir <[email protected]>

Author: whatseni