docs: translate build a react app from scratch page into korean#1211

lumirlumir merged 4 commits intoreactjs:mainreactjs/ko.react.dev:mainfrom

2hanbyeol1:translate-build-a-react-app-from-scratch2hanbyeol1/ko.react.dev:translate-build-a-react-app-from-scratchCopy head branch name to clipboard