Adding localization (Russian and English)

🌍 Devlog — Localization System

Today I implemented a localization system — now the game is available in two languages: Russian and English.

What's done:

• ✅ Two buttons have been added to the menu: RU and ENG.
• ⚙️ The player can switch the language directly in the settings.
• 💾 Created a LocalizationManager script that automatically loads translations from JSON files (ru.json and en.json).
• 🔑 All texts in the game are now displayed using language keys.