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

src/locales/en.json

@@ -0,0 +1,101 @@
+{
+  "welcome": {
+    "greeting": "Welcome to Telegram Tinder Bot! 💕",
+    "description": "Find your soulmate right here!",
+    "getStarted": "Get Started"
+  },
+  "profile": {
+    "create": "Create Profile",
+    "edit": "Edit Profile",
+    "view": "View Profile",
+    "name": "Name",
+    "age": "Age",
+    "city": "City",
+    "bio": "About",
+    "photos": "Photos",
+    "gender": "Gender",
+    "lookingFor": "Looking for",
+    "datingGoal": "Dating Goal",
+    "hobbies": "Hobbies",
+    "lifestyle": "Lifestyle",
+    "male": "Male",
+    "female": "Female",
+    "both": "Both",
+    "relationship": "Relationship",
+    "friendship": "Friendship",
+    "dating": "Dating",
+    "hookup": "Hookup",
+    "marriage": "Marriage",
+    "networking": "Networking",
+    "travel": "Travel",
+    "business": "Business",
+    "other": "Other"
+  },
+  "search": {
+    "title": "Browse Profiles",
+    "noProfiles": "No more profiles! Try again later.",
+    "like": "❤️ Like",
+    "dislike": "👎 Pass",
+    "superLike": "⭐ Super Like",
+    "match": "It's a match! 🎉"
+  },
+  "vip": {
+    "title": "VIP Search",
+    "premiumRequired": "This feature is available for premium users only",
+    "filters": "Filters",
+    "ageRange": "Age Range",
+    "cityFilter": "City",
+    "datingGoalFilter": "Dating Goal",
+    "hobbiesFilter": "Hobbies",
+    "lifestyleFilter": "Lifestyle",
+    "applyFilters": "Apply Filters",
+    "clearFilters": "Clear Filters",
+    "noResults": "No profiles found with your filters",
+    "translateProfile": "🌐 Translate Profile"
+  },
+  "premium": {
+    "title": "Premium Subscription",
+    "features": "Premium features:",
+    "vipSearch": "• VIP search with filters",
+    "profileTranslation": "• Profile translation to your language",
+    "unlimitedLikes": "• Unlimited likes",
+    "superLikes": "• Extra super likes",
+    "price": "Price: $4.99/month",
+    "activate": "Activate Premium"
+  },
+  "translation": {
+    "translating": "Translating profile...",
+    "translated": "Profile translated:",
+    "error": "Translation error. Please try again later.",
+    "premiumOnly": "Translation is available for premium users only"
+  },
+  "commands": {
+    "start": "Main Menu",
+    "profile": "My Profile",
+    "search": "Browse",
+    "vip": "VIP Search",
+    "matches": "Matches",
+    "premium": "Premium",
+    "settings": "Settings",
+    "help": "Help"
+  },
+  "buttons": {
+    "back": "« Back",
+    "next": "Next »",
+    "save": "Save",
+    "cancel": "Cancel",
+    "confirm": "Confirm",
+    "edit": "Edit",
+    "delete": "Delete",
+    "yes": "Yes",
+    "no": "No"
+  },
+  "errors": {
+    "profileNotFound": "Profile not found",
+    "profileIncomplete": "Please complete your profile",
+    "ageInvalid": "Please enter a valid age (18-100)",
+    "photoRequired": "Please add at least one photo",
+    "networkError": "Network error. Please try again later.",
+    "serverError": "Server error. Please try again later."
+  }
+}