🌐 [i18n-KO] Translated `package_reference/mixins.md` to Korean (#2166)
* docs: ko: package_reference/mixins.md
* feat: nmt draft
* fix: manual edits
* fix: resolve suggestions
* fix: resolve suggestions
Co-authored-by: Chulhwa (Evan) Han <cjfghk5697@ajou.ac.kr>
* fix: resolve suggestions
Co-authored-by: Seoyoung Kim <79852630+seoyoung-3060@users.noreply.github.com>
* fix: resolve suggestions
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Co-authored-by: Chulhwa (Evan) Han <cjfghk5697@ajou.ac.kr>
Co-authored-by: Seoyoung Kim <79852630+seoyoung-3060@users.noreply.github.com>
Co-authored-by: Lucain <lucainp@gmail.com>