Fix notification loop, add Discord support, and specific Multi-language (English/Turkish)

[elaxptr]

Summary

This PR improves reliability, adds new notification channels, and introduces localization.

1. Bug Fixes & Stability

• Fixed Infinite Notification Loop: The bot now correctly updates cart_status to prevent spamming the same stock alert.
• Optimized Performance: Replaced static sleeps with WebDriverWait for faster and more reliable element detection.
• Crash Prevention: Made pygame optional and pinned urllib3 for Selenium compatibility.
• Clean Logging: Suppressed verbose error traces when items are simply out of stock.

2. Discord Webhook Support

• Added optional DISCORD_WEBHOOK_URL configuration.
• Users can now choose Telegram, Discord, or both for notifications.
• Fully backward compatible for existing users.

3. Multi-language Support 🌍

• Replaced hardcoded Turkish strings with a dynamic localization system.
• Languages: Supports English (en) and Turkish (tr).
• Default: Defaults to English for broader accessibility.
• Config: Controlled via LANGUAGE variable in .env.

4. Docker Support 🐳

• Added Dockerfile and docker-compose.yml for containerized deployment.
• Run with a single command: docker compose up -d
• Config files are mounted so you can edit them without rebuilding.

[tamerks]

Thank you for your effort. I will take a look mate.