Add support for Inertia optional props

[hailwood]

No description provided.

[gemini-code-assist]

Summary of Changes

Hello @hailwood, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request introduces support for Inertia's OptionalProp within the DataProvider class. By recognizing and processing OptionalProp return types, the change allows for more flexible data handling, enabling developers to define props that are conditionally included in Inertia responses, thereby enhancing the dynamism of data provision.

Highlights

• New Feature Support: Added support for Inertia\OptionalProp within the DataProvider.
• DataProvider Logic Update: Modified the toArray method in DataProvider.php to correctly identify and invoke methods returning an OptionalProp, aligning its behavior with DeferProp and LazyProp.

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[gemini-code-assist]

Code Review

The pull request correctly adds support for Inertia's OptionalProp. However, I've identified a potential issue with how special prop types are detected, as it doesn't account for modern PHP features like union types. I've provided a suggestion to make this more robust. Additionally, this pull request would be stronger if it included a test case to verify the new functionality for OptionalProp and prevent future regressions.