Add Korean translate

Co-authored-by: jackfrost <jackfrost5446@naver.com>

src/app/i18n/Language.jsx

@@ -8,6 +8,7 @@ import * as RU from './ru';
 import * as PL from './pl';
 import * as PT from './pt';
 import * as CN from './cn';
+import * as KO from './ko';
 import * as d3 from 'd3';
 
 let fallbackTerms = EN.terms;
@@ -29,6 +30,7 @@ export function getLanguage(langCode) {
     case 'pl': lang = PL; break;
     case 'pt': lang = PT; break;
     case 'cn': lang = CN; break;
+    case 'ko': lang = KO; break;
     default:
       lang = EN;
   }
@@ -97,5 +99,6 @@ export const Languages = {
   ru: 'ру́сский',
   pl: 'polski',
   pt: 'português',
-  cn: '中文'
+  cn: '中文',
+  ko: '한국어'
 };

src/app/i18n/ko.js

@@ -0,0 +1,16 @@
+export const formats = {
+    decimal: '.',
+    thousands: ',',
+    grouping: [3],
+    currency: ['₩', ''],
+    dateTime: '%a %b %e %X %Y',
+    date: '%Y/%m/%d',
+    time: '%H:%M:%S',
+    periods: ['오전', '오후'],
+    days: ['일요일', '월요일', '화요일', '수요일', '목요일', '금요일', '토요일'],
+    shortDays: ['일', '월', '화', '수', '목', '금', '토'],
+    months: ['1월', '2월', '3월', '4월', '5월', '6월', '7월', '8월', '9월', '10월', '11월', '12월'],
+    shortMonths: ['1월', '2월', '3월', '4월', '5월', '6월', '7월', '8월', '9월', '10월', '11월', '12월']
+};
+
+export { default as terms } from './ko.json';