feat: Complete localization system with i18n and DeepSeek AI translation

🌐 Interface Localization:
- Added i18next for multi-language interface support
- Created LocalizationService with language detection
- Added translation files for Russian and English
- Implemented language selection in user settings

🤖 AI Profile Translation (Premium feature):
- Integrated DeepSeek API for profile translation
- Added TranslationController for translation management
- Premium-only access to profile translation feature
- Support for 10 languages (ru, en, es, fr, de, it, pt, zh, ja, ko)

�� Database & Models:
- Added language field to users table with migration
- Updated User model to support language preferences
- Added language constraints and indexing

🎛️ User Interface:
- Added language settings menu in bot settings
- Implemented callback handlers for language selection
- Added translate profile button for VIP users
- Localized all interface strings

📚 Documentation:
- Created comprehensive LOCALIZATION.md guide
- Documented API usage and configuration
- Added examples for extending language support

package.json

@@ -12,8 +12,9 @@
   },
   "dependencies": {
     "@types/node-telegram-bot-api": "^0.64.11",
-    "axios": "^1.6.2",
+    "axios": "^1.12.1",
     "dotenv": "^16.6.1",
+    "i18next": "^25.5.2",
     "node-telegram-bot-api": "^0.64.0",
     "pg": "^8.11.3",
     "sharp": "^0.32.6",