[5.x] Feature: Allow enum in HasAuthorization trait

[webard]

Description

According to #18847, this PR allows UnitEnum as an $action parameter in HasAuthorization trait.

Functional changes

• Code style has been fixed by running the composer cs command.
• Changes have been tested to not break existing functionality.
• Documentation is up-to-date.

[Copilot]

Pull request overview

This PR adds support for UnitEnum as the $action parameter in the HasAuthorization trait methods, allowing developers to use enum values instead of just strings when checking authorization. This is part of a broader effort to support enums throughout Filament, as referenced in issue #18847.

Key changes:

• Updated three method signatures (getAuthorizationResponse, can, authorize) to accept UnitEnum | string instead of just string
• Added use UnitEnum; import statement

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.