PR Summary

• Updated .gitignore
  The file .gitignore has been updated to ignore certain config files typical of a developer's local environment, preventing them from being accidentally committed to the repository.
• Added New Dependency
  A new software library, rector/rector, has been added to our project's dependencies. This tool helps us improve our code by automatically applying certain guidelines and standards.
• Added Rector Configuration File
  A rector.php file has been added for custom configuration of the rector tool.
• Improved Code in Various Files
  Several files, including ConvertPaymentAction.php, TableGatewayStorage.php, GetHttpRequestAction.php, ArrayObject.php, CreditCardDate.php, Identity.php, PayumBuilder.php, HumanifyTest.php, AuthorizeAction.php, GetAddresses.php and StatusAction.php have been updated for better performance and correctness. The changes primarily revolve around how certain variables and functions are checked and evaluated.
• Refined Data Validation in Payment Conversion Actions
  Specifically in ConvertPaymentAction.php and ConvertPayoutAction.php, the verification and handling of values associated with transactions such as currency code and amount have been improved.