common/s*: add and update Korean translation (#14666)

* common/s*: add and update Korean translation

* scamper: fix typo

* Update pages.ko/common/simplehttpserver.md

Co-authored-by: Chooooo <contact@choo.ooo>

* Update pages.ko/common/steamcmd.md

Co-authored-by: Chooooo <contact@choo.ooo>

---------

Co-authored-by: Sebastiaan Speck <shem.speck@gmail.com>
Co-authored-by: Chooooo <contact@choo.ooo>

pages.ko/common/sleep.md

@@ -0,0 +1,12 @@
+# sleep
+
+> 지정된 시간만큼 지연.
+> 더 많은 정보: <https://pubs.opengroup.org/onlinepubs/9699919799/utilities/sleep.html>.
+
+- 초 단위 지연:
+
+`sleep {{초}}`
+
+- 20초 지연 후 특정 명령 실행:
+
+`sleep 20 && {{명령}}`