Translating to korean for concurrent-mode-intro.md(ver 1.0) (#186)

* I translated to korean for concurrent-mode-intro

* Tranlating to korean for concourrent-mode-intro.md

* Modified concurrent-mode-intro.md

* Modified concurrent-mode-intro.md(ver 3.0)

* Modifed concurrent-mode-intro.md(ver 4.0)

* Modified concurrent-mode-intro.md

* Modifed concurrent-mode-intro.md (ver 6.0)

* Modified concurrent-mode-intro.md (ver 7.0)

* Modified concurrent-mode-intro.md (ver 8.0)

* Modified concurrent-mode-intro.md (ver 9.0)

* Resolving Conflict

* Resolving confliect(ver 2.0)

* Delete concurrent-mode-intro.md

* Resolving

Co-authored-by: Haegul Pyun <[email protected]>

Author: Yohan-Kim2