Add PHP 8.4 compatibility

[peterjaap]

Ran Rector with the following config:

<?php

declare(strict_types=1);

use Rector\Config\RectorConfig;
use Rector\ValueObject\PhpVersion;
use Rector\Set\ValueObject\LevelSetList;
use Rector\Set\ValueObject\SetList;

return static function (RectorConfig $rectorConfig): void {
    // Set the PHP version to 8.4
    $rectorConfig->phpVersion(PhpVersion::PHP_84);

    // Paths to include for the refactoring
    $rectorConfig->paths([
        __DIR__ . '/src',
        __DIR__ . '/app',
        __DIR__ . '/tests',
    ]);

    // Include rule sets for PHP 8.4
    $rectorConfig->sets([
        LevelSetList::UP_TO_PHP_84,
        SetList::CODE_QUALITY,
        SetList::TYPE_DECLARATION,
        SetList::DEAD_CODE,
    ]);

    // Optionally, add custom configuration for specific Rectors
    $rectorConfig->importNames();
    $rectorConfig->importShortClasses();
};