feat: test architecture

[rgomezcasas]

To do:

• Stop depending on the fork when feat: add ShouldHaveOnlyOnePublicMethod rule carlosas/phpat#237 is merged.

[carlosas]

Maybe you want to set ignore_built_in_classes: true in the configuration
https://www.phpat.dev/documentation/configuration/

(true will be the default value in the next minor version v0.11.0)

[rgomezcasas]

For now, I prefer to keep it disabled, as there are some built-in classes that we consider to be infrastructure (such as Reflection), and we might overlook them.

I would rather manually add all domain built-in classes, accepting the possibility of forgetting to add an Infrastructure class and not receiving an error. 🙌