feat: Add Korean language support

Add Korean language support to the application. This includes translating the necessary UI elements and adding Korean to the supported language list.

src/i18n/index.ts

@@ -14,6 +14,7 @@ import { de } from "./lang/de";
 import { da } from "./lang/da";
 import { no } from "./lang/no";
 import { sv } from "./lang/sv";
+import { ko } from "./lang/ko";
 
 
 i18n
@@ -37,7 +38,8 @@ i18n
             da: da,
             no: no,
             de: de,
-            sv: sv
+            sv: sv,
+            ko: ko,
         },
         fallbackLng: "en",
         lng: localStorage.getItem("i18nextLng") || "en",