refactor: Translation System

[S0ly]

trafficstars

This pull request aims to refactor the translation system for better organization and ease of future translations.

Changes:

• [x] Move all translation files into their own folder.
• [ ] Refactor translations into PHP files. (start by 'EN' folder)
• [ ] Update translation keys and remove obsolete translations.
• [ ] Complete the README to explain the new translation process and testing procedures.

Note: These changes will invalidate current translations but will simplify future translations.

Contributors are welcome to help with this pull request. Thank you!