feat(i18n): add internationalization support with i18next

- Add i18next and related dependencies for translation support
- Create locale files for English and Farsi languages
- Implement i18n configuration and provider in layout
- Set up route factory and constants for internationalized routes
- Remove test button components and simplify main page

src/assets/constants/index.ts

@@ -0,0 +1,7 @@
+import { footerMenu } from './footerMenu';
+import routeFactory from './routeFactory';
+
+export const appConstants = {
+  routeFactory,
+  footerMenu,
+};