fix: required is not added to rules and rules overriding

[what-the-diff[bot]]

PR Summary

• Enhanced Documentation for Rule Overwriting A section was added to the fields.md document to guide users on how to overwrite or reset rules. This includes a practical example to aid understanding.

• Expanded Flexibility of Rules Handling In the Field.php file:

  • The rules method has been modified to now accept multiple rule arguments instead of just one, offering a more dynamic experience.
  • An additional method, overwriteRules, has been introduced. This enables the replacement of current rules with new ones.
  • The required method has been revised to append the 'required' rule instead of simply assigning it, ensuring the preexisting rules are not overwritten.

[binaryk]

Please fix tests and add a unit test that covers this functionality.

Thank you!

[maicol07]

@binaryk done! However, I don't know where to add a test for this methods (related to rules)

[binaryk]

Thank you for your contribution, however at this point we cannot merge PR's without tests.

More than that, the fluent API should follow the Laravel Nova way, using that method to overwrite rules doesn't feels natural.

[maicol07]

@binaryk I'll redo the PR with just the fix for the issue without overriding anything

[maicol07]

The new PR is this one: #575