Set PHPStan to Maximum Level

[n4ss1m]

This PR increases the PHPStan analysis level to max, ensuring stricter static analysis and improved code quality for the.

Changes

• Set PHPStan level to max in phpstan.neon
• Added PHPStan baseline for PHP 8.1 to handle known errors
• Updated method signatures to include explicit return types
• Refactored models and controllers:
  • Added type hints for method parameters and return types
  • Improved PHPDoc annotations for better static analysis
• Fixed test cases:
  • Used firstOrFail() instead of first() for stricter data validation
  • Added assertions to ensure consistency with test expectations
• Introduced compatibility handling:
  • Added ignore-by-php-version.neon.php to manage PHP version-specific errors

Benefits

• Enforces stricter type safety and code quality
• Reduces potential runtime errors by catching issues earlier
• Improves maintainability and consistency of the codebase