Enhance root layout and admin interface for better usability

- Updated the root layout to include a mobile menu toggle, improving navigation on smaller screens.
- Refactored navigation links and language/theme selection for better organization and accessibility.
- Added overflow handling for admin navigation and tables to ensure proper display on smaller screens.
- Improved translations for menu toggle accessibility in both Russian and English.

frontend/src/shared/lib/i18n.ts

@@ -48,6 +48,7 @@ const resources = {
         settings: 'Настройки',
         admin: 'Админка',
         logout: 'Выйти',
+        toggleMenu: 'Меню',
       },
 
       activation: {
@@ -315,6 +316,7 @@ const resources = {
         settings: 'Settings',
         admin: 'Admin',
         logout: 'Log out',
+        toggleMenu: 'Menu',
       },
 
       activation: {