docs(ko/webextensions): add korean translation of 'user_interface' page

[C17AN]

Description

Add korean translation of [webextension/user_interface] page.

Related issues and pull requests

• SourceCommit link

[github-actions]

Preview URLs

• /ko/docs/Mozilla/Add-ons/WebExtensions/user_interface

Flaws (34)

URL: /ko/docs/Mozilla/Add-ons/WebExtensions/user_interface
Title: 사용자 인터페이스
Flaw count: 34

• macros:
  • /ko/docs/Mozilla/Add-ons/WebExtensions/What_next does not exist but fell back to /en-US/docs/Mozilla/Add-ons/WebExtensions/What_next
  • /ko/docs/Mozilla/Add-ons/WebExtensions/API does not exist but fell back to /en-US/docs/Mozilla/Add-ons/WebExtensions/API
  • /ko/docs/Mozilla/Add-ons/WebExtensions/Content_scripts does not exist but fell back to /en-US/docs/Mozilla/Add-ons/WebExtensions/Content_scripts
  • /ko/docs/Mozilla/Add-ons/WebExtensions/Background_scripts does not exist but fell back to /en-US/docs/Mozilla/Add-ons/WebExtensions/Background_scripts
  • /ko/docs/Mozilla/Add-ons/WebExtensions/Match_patterns does not exist but fell back to /en-US/docs/Mozilla/Add-ons/WebExtensions/Match_patterns
  • and 29 more flaws omitted

External URLs (2)

URL: /ko/docs/Mozilla/Add-ons/WebExtensions/user_interface
Title: 사용자 인터페이스

• https://extensionworkshop.com/documentation/develop/build-an-accessible-extension/ (1 time) (Note! This may be a new URL 👀)
• https://extensionworkshop.com/documentation/develop/user-experience-best-practices/ (1 time) (Note! This may be a new URL 👀)

[sunhpark42]

안녕하세요 @C17AN 님, 수정사항 확인했습니다. 확인이 많이 늦어져서 죄송합니다.
추가 수정할 부분 없어 바로 머지하겠습니다.
기여 감사합니다.