add index.js files for every locale

src/i18n/locales/as/index.js

@@ -0,0 +1,9 @@
+import app from './app';
+import leftSidebar from './leftSidebar';
+import rightSidebar from './rightSidebar';
+
+export default {
+  app,
+  leftSidebar,
+  rightSidebar,
+};