fixes and improvements

[bezhanSalleh]

Fixes #304 & some performance improvments.

[what-the-diff]

PR Summary

• Code Optimizations in MakeShieldGenerateCommand.php
  In this pull request, repeated code patterns have been removed and replaced by utilizing specific keys of associative arrays for value extraction. These changes enhance the readability and maintainability of the code alongside reducing possible coding mistakes.

• Updates and Improvement in FilamentShield.php
  In FilamentShield.php, a method has been added which retrieves the widget class from a WidgetConfiguration object. Various methods have been updated significantly to use specific keys from associative arrays, improving the efficiency of code. Moreover, redundant methods like transformClassString and hasHeadingForShield have been removed. For generating the default permission identifier, instead of after, afterLast is used, improving the generation logic.

• Refactor and Enhancements in RoleResource.php
  In RoleResource.php, enhancements are made to use the permission key of an array instead of the entire value, leading to more efficient code. Also, instead of inline code, methods from an external resource (getCheckBoxListComponentForResource) are utilized, increasing modularity and reusability of the code base.