add ko-kr.h & change README.md locale.h

[codehooni]

I sent you a Korean translation full request. Please check it (#415)

###Added files

• include/private/config/locale/ko-kr.h (Korean translation file)

###Files with added content

• include/private/config/�wrapper/locale.h
  # elif defined USE_LOCALE_KO_KR #iclude "private/config/locale/ko-kr.h＂
• README.md
  :ko: add

• I checked that the file has been changed. I changed the file in wrapper/locale.h accordingly!

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.79%. Comparing base (61ed7da) to head (06ea95d).

Additional details and impacted files

@@           Coverage Diff           @@
##           latest     #423   +/-   ##
=======================================
  Coverage   90.79%   90.79%           
=======================================
  Files          48       48           
  Lines        4335     4335           
  Branches      577      577           
=======================================
  Hits         3936     3936           
  Misses        268      268           
  Partials      131      131           

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[goatshriek]

Thank you very much for your hard work in putting this translation together and submitting it! Once again, my apologies for the delay in getting this reviewed and merged.