Add is_lazy configuration

[andreia]

Add the is_lazy configuration to be able to use it on relation manager.

[what-the-diff]

PR Summary

• Introduction of 'is_lazy' Configuration Option
  A new configuration option, is_lazy, has been introduced into the filament-auditing.php configuration file. This allows for enhanced control over certain elements in the system.

• Addition of 'isLazy()' Method to 'AuditsRelationManager' Class
  The 'AuditsRelationManager' class now includes a new method named isLazy(). This method provides an additional functionality to the system, enhancing its capabilities.

• README File Update
  The instructions document, README.md, has been updated with clearer instructions on how to trigger the updateAuditsRelationManager event and set the is_lazy configuration to false. This provides users with better guidance on using the said features.