[문서] C30 충돌 해결 및 미번역분 번역 - #1871

[문서] C30 충돌 해결 및 미번역분 번역#1871

Turtle-Hwan wants to merge 9 commits into

javascript-tutorial:2026-en-mergejavascript-tutorial/ko.javascript.info:2026-en-mergefrom

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