fix: JIRA-16017 Resolve multi-line array shapes

[owenvoke]

This resolves an issue where multi-line array shapes were being unnecessarily modified.

[Copilot]

Pull Request Overview

Fix multi-line array shape handling by preventing unnecessary space normalization across line breaks in generics.

• Update the fixer to use PhpCsFixer\Preg with regex that avoids adding spaces after commas when followed by a newline.
• Process annotations via getTypes()/setTypes() to handle multiple types uniformly.
• Add a test covering multi-line array shapes; bump ECS dev dependency to ^12.6.

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
tests/PhpCsFixer/SpaceInGenericsFixerTest.php	Adds a test ensuring multi-line array shapes aren’t modified incorrectly.
src/PhpCsFixer/SpaceInGenericsFixer.php	Adjusts spacing logic using PhpCsFixer\Preg and updates annotation handling to map over types.
composer.json	Bumps symplify/easy-coding-standard from ^12.5 to ^12.6 for tooling compatibility.

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