Add ESLint to maintain code style. Add pre-commit hook to lint prior.

ESLint is used with the standard react plugin. It detects all kinds of
issues ranging from misspells, indentation, variable-naming, etc.
A pre-commit hook is added to git. Prior commiting, ESlint will run
to validate that everything is OK and the user will have the option
to fix it.

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

src/i18n.js

@@ -14,14 +14,14 @@ const resources = {
 };
 
 i18n.use(LanguageDetector)
-    .use(initReactI18next)
-    .init({
-      resources,
-      fallbackLng: 'en',
-      debug: true,
-      interpolation: {
-        escapeValue: false, // not needed for react as it escapes by default
-      },
-    });
+  .use(initReactI18next)
+  .init({
+    resources,
+    fallbackLng: 'en',
+    debug: true,
+    interpolation: {
+      escapeValue: false, // not needed for react as it escapes by default
+    },
+  });
 
 export default i18n;