Add the possibility to specify layout section order

[giuscris]

This pull request introduces improvements to the Layout and Section classes within the layout fields system. The main focus is on optimizing how sections are handled, specifically by enabling dynamic sorting and enhancing data interoperability.

Enhancements to section handling and layout construction:

• The Layout class now lazily initializes its sections property and ensures sections are always sorted by their order value, improving both performance and consistency when accessing sections. [1] [2]
• The Section class now implements the Arrayable interface and uses the DataArrayable trait, making it easier to convert section data to arrays for serialization or further processing.
• A new order() method was added to the Section class, which retrieves the section's order for sorting, defaulting to PHP_INT_MAX if not set. This supports the new sorting logic in Layout.

[Copilot]

Pull Request Overview

This pull request enhances the Layout and Section classes to support custom ordering of sections in layout fields.

Key changes:

• Section class now implements the Arrayable interface for better data serialization
• Added an order() method to Section class to retrieve section order values
• Layout class now lazily initializes and automatically sorts sections by their order value

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
formwork/src/Fields/Layout/Section.php	Implements Arrayable interface, adds DataArrayable trait, and introduces order() method for section ordering
formwork/src/Fields/Layout/Layout.php	Refactors constructor to use promoted properties and implements lazy initialization of sections with automatic sorting

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