Upgrade static analysis tools and fix uncovered issues

[MidnightDesign]

No description provided.

[Copilot]

Pull Request Overview

This PR upgrades static analysis tools (PHPStan, Psalm, PHPUnit, and Infection) to their latest versions and addresses issues uncovered by the upgraded tooling. The changes focus on modernizing code to use PHP 8+ features and fixing newly detected issues.

• Upgraded major dependencies including PHPStan 2.x, PHPUnit 12.x, Psalm 6.x, and Infection 0.31.x
• Replaced deprecated @dataProvider annotations with #[DataProvider] attributes across all test files
• Added #[Override] attributes to method overrides and simplified type equality logic

Reviewed Changes

Copilot reviewed 29 out of 29 changed files in this pull request and generated 1 comment.

File	Description
composer.json	Updated dependency versions for static analysis and testing tools
infection.json	Added schema validation and PHPStan integration
tests/unit/*.php	Modernized test files with DataProvider attributes and new test methods
src/*.php	Added Override attributes and simplified implementation logic

Comments suppressed due to low confidence (1)

src/Type.php:203

• Removing the check for 'any' type as subtype breaks the type system semantics. The 'any' type should be a subtype of all types, making this removal incorrect.

            return false;
        }

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