add README-ko.md

[pengooseDev]

Feature

'23.12.29

• [x] add README-ko.md
• [x] update README.md(add README-ko.md link)
• [x] update README-ja.md(add README-ko.md link)

'24.01.01

• [x] sync upstream docs update(resolve conflict & updatem README-ko.md)

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EN : If you need a multilingual translation module for your application, please comment further :) JA : アプリケーションに多言語翻訳モジュールが必要な場合は、追加的にコメントを残していただければ幸いです :)

[pengooseDev]

@cumulo-autumn Add commit that Sync changes in upstream docs :) I'd appreciate it if u leave a single comment with this PR's feedback

[cumulo-autumn]

Hi @pengooseDev. I am sorry for the late reply. We truly appreciate your great contribution to making the README-ko. It really helps. Currently, we are also preparing a Chinese version readme, README-zh. After that, we will merge your PR and put both links to the front page!

[cumulo-autumn]

@pengooseDev It seems that preparing the Chinese README is going to take a bit more time, so I went ahead and merged the Korean README you provided first! Thank you for your contribution!