Add Korean translation of readme.md

[parksb]

Description

I translated the readme document into Korean.

Requirements / Checklist

• Read the Contributing Guidelines
• Read or at least glanced at the FAQ
• Read or at least glanced at the Wiki
• Scripts execute without error (if necessary):
  • If any of the scripts were modified they have been tested and execute without error, e.g.:
    • ./font-patcher Inconsolata.otf --fontawesome --octicons --pomicons
    • ./gotta-patch-em-all-font-patcher\!.sh Hermit
• Extended the README and documentation if necessary, e.g. You added a new font please update the table

What does this Pull Request (PR) do?

This PR adds a Korean translation of readme.md

How should this be manually tested?

N/A

Any background context you can provide?

N/A

What are the relevant tickets (if any)?

#118

Screenshots (if appropriate or helpful)

N/A

[ryanoasis]

Looks great, did a spot check. Thanks for the contribution 🎉