Added Korean README.md file
#### Describe if there is any unusual behaviour of your code(Write `NA` if there isn't)
NA
#### Additional context (OPTIONAL)
Test plan (OPTIONAL)
Checklist
[x] My code follows the code style of this project.
[x] I have performed a self-review of my own code.
[x] My change requires a change to the documentation.
[x] I have updated the documentation accordingly.
[x] I have commented my code, particularly in hard-to-understand areas.
[x] My changes generate no new warnings.
[x] I have added tests that prove my fix is effective or that my feature works.
[x] The title of my pull request is a short description of the requested changes.
Issue Number
ISSUE # 156
Describe the changes you've made
Added Korean README.md file #### Describe if there is any unusual behaviour of your code(Write `NA` if there isn't) NA #### Additional context (OPTIONAL)Test plan (OPTIONAL)
Checklist