adds translation support via i18n.js

Uses react-i18next library to provide APIs for translational
purposes.
Translation data is loaded from `src/locales/{{lng}}/translation.json`
and is accessed by dot notation.
The data can be translated in two ways:
1. In functional components, a method `t` can be instantiated using the
`useTranslation` method from rect-18next.
2. In class components, a method `t` can be accessed via props while
exporting the component with `withTranslation` method from react-i18next
library.

The syntax will look like `t('data.data')` or `this.props.t('data.data')`

Signed-off-by: Sudhanshu Gautam <me@sudhanshug.com>

src/i18n.js

@@ -1,16 +1,20 @@
 import i18n from 'i18next';
 import { initReactI18next } from 'react-i18next';
-
-import Backend from 'i18next-xhr-backend';
 import LanguageDetector from 'i18next-browser-languagedetector';
-// not like to use this?
-// have a look at the Quick start guide 
-// for passing in lng and translations on init
+import translationEN from './locales/en/translation.json';
+import translationDE from './locales/de/translation.json';
+
+
+const resources = {
+  en: {
+    translation: translationEN
+  },
+  de: {
+    translation: translationDE
+  }
+};
 
 i18n
-  // load translation using xhr -> see /public/locales
-  // learn more: https://github.com/i18next/i18next-xhr-backend
-  .use(Backend)
   // detect user language
   // learn more: https://github.com/i18next/i18next-browser-languageDetector
   .use(LanguageDetector)
@@ -19,6 +23,7 @@ i18n
   // init i18next
   // for all options read: https://www.i18next.com/overview/configuration-options
   .init({
+    resources,
     fallbackLng: 'en',
     debug: true,