i18n(ko-KR): create `card-grid.mdx` #7495

Job	Run time
Check for accessibility issues	2m 25s
changes	4s
Run type checks	35s
Docs site builds on Windows	2m 14s
Check for broken links	1m 13s
Run E2E tests (${{ matrix.os }})	0s
Run unit tests	0s
	6m 31s

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