Pass language setting to session initialization

Updated the session initialization in createWindows to retrieve the current language setting using getSettings and pass it to listenService.initializeSession. If fetching the language fails, it defaults to 'en'. This ensures the session starts with the correct language context.

Remove all multi-language test files

Deleted the entire tests directory, including unit, integration, and end-to-end test files, Jest configuration, test runner scripts, and related documentation. This removes all automated testing and test documentation for multi-language support.

Update with new windowManager.js

Author: TiteTia