docs: add need translation issue template

[nayounsang]

close #1143

Add 번역 필요 issue template

• Add 번역 필요 issue template
• need translation label and [번역 필요]: title prefix

필수 확인 사항

• 기여자 행동 강령 규약^{Code of Conduct}
• 기여 가이드라인^Contributing
• 공통 스타일 가이드^{Universal Style Guide}
• 번역을 위한 모범 사례^{Best Practices for Translation}
• 번역 용어 정리^{Translate Glossary}
• textlint 가이드^{Textlint Guide}
• 맞춤법 검사^{Spelling Check}

선택 확인 사항

• 번역 초안 작성^{Draft Translation}
• 리뷰 반영^{Resolve Reviews}

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Pull Request Overview

This PR adds a new issue template for translation requests to improve the process of flagging documents that require translation.

• Adds a 번역 필요 issue template
• Uses the need translation label and [번역 필요]: title prefix

[lumirlumir]

오 감사합니다! LGTM