Add korean version readme (#415)

* update readme (korean version of readme)

* update readme (translations section)

Author: pilgwon

README.md

@@ -425,6 +425,10 @@ You can add ComposableArchitecture to an Xcode project by adding it as a package
 
 The latest documentation for the Composable Architecture APIs is available [here](https://trading-point.github.io/reactiveswift-composable-architecture/).
 
+## Translations
+
+Korean version of this document can be found [here](https://gist.github.com/pilgwon/ea05e2207ab68bdd1f49dff97b293b17).
+
 ## Help
 
 If you want to discuss the Composable Architecture or have a question about how to use it to solve a particular problem, you can start a topic in the [discussions](https://github.com/pointfreeco/swift-composable-architecture/discussions) tab of this repo, or ask around on [its Swift forum](https://forums.swift.org/c/related-projects/swift-composable-architecture).