feat: Added support for i18n (#2439)

* Added translation for various react components in OHIF-v3

* Added a test language for debugging- test-LNG 

* Added copy for test language to not get overwritten

platform/i18n/src/utils.js

@@ -54,6 +54,7 @@ const languagesMap = {
   zh: 'Chinese',
   'zh-CN': 'Chinese (China)',
   'zh-TW': 'Chinese (Taiwan)',
+  'test-LNG': 'Test Language',
 };
 
 const getLanguageLabel = (language) => {