Fix langswitch for Laravel 11 and 12

[askdkc]

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[what-the-diff]

PR Summary

• Improved Installation Process for Language Switcher
  The InstallLanguageSwitcher.php command's functionality has been updated. Now, it will ensure the necessary 'middleware' directory exists before copying the Localization middleware. This improvement boosts the reliability of set-up and minimizes issues resulting from missing file directories.

• Adjustment of Middleware Registration File
  Previously, our system was registering the middleware in the app/Http/Kernel.php file. We've shifted this process to the bootstrap/app.php file. This change aligns with our commitment to streamline our software's structure and enable easier maintenance.

• Enhanced Success Message Accuracy
  We've amended the success message that appears upon successful registration of middleware. Now, it accurately displays the file where the middleware has been registered, ensuring better communication and clarity for our users.

• Logic Updates to Facilitate Middleware Addition
  Our team has refined the logic to add the Localization middleware to bootstrap/app.php. Instead of retaining the existing placeholder, this adjusted logic now incorporates the new middleware entry. By doing so, we further strengthen the system's versatility and adaptability.

• Removal of Redundant 'Kernel.stub' File
  Following our refined logic for middleware addition, the Kernel.stub file, previously used for storing middleware registration placeholders, has become redundant. As part of our commitment to maintaining a clean, uncluttered system, we've removed this file.