[Fix] Switching between tenant aware panel and normal panel

PR Summary

Updated coding style configuration The .editorconfig file, which provides coding style rules for our editors and IDEs, has been updated to no longer add a newline at the end of our files.
Introduced test-results data We now have a new file /.phpunit.cache/test-results that stores the results of our unit tests. Unit tests help us maintain the quality of our code by ensuring different parts work as intended.
Disabled certain coding style rule A rule enforcing a single blank line at the end of files has been switched off in pint.json, offering developers more flexibility in their coding style.
Simplified webpage template Our panel-switch-menu.blade.php file, responsible for creating parts of our web interface, has been simplified. This makes the code easier to read and less error-prone, while still achieving the same result.
Revised panel switch logic With changes implemented in PanelSwitch.php, we improved the way our web interface switches between panels. This simplifies and clarifies the underlying code, making it easier to manage and understand. This improves our ability to handle panels safely.
Improved coding style consistency Minor changes have been made across various PHP files to ensure consistent formatting. This doesn't change the way our product works but helps us maintain a clean and consistent code base.