feat: Add Turkish (tr) language support

[fabyo0]

This PR adds comprehensive Turkish language support to the Laravel application, providing a fully localized experience for Turkish users.

🚀 Changes Made

• Core Laravel translations:

  • auth.php - Authentication messages
  • validation.php - Form validation messages
  • pagination.php - Pagination controls
  • passwords.php - Password reset messages
  • labels.php - General UI labels and backend management

• Application-specific translations:

  • tr.json - General application strings with placeholder support
  • Module-specific translations for:
    • Posts management
    • Categories management
    • Tags management
    • Comments management

🎯 Features

• ✅ Complete Turkish translations for all user-facing messages
• ✅ Proper handling of Laravel placeholders (:attribute, :value, etc.)
• ✅ Backend admin panel fully translated
• ✅ SEO-friendly Turkish field names and descriptions
• ✅ Consistent terminology across all modules