added php fixer file

<?php

declare(strict_types=1);

require_once './vendor/autoload.php';

use Nextcloud\CodingStandard\Config;

$config = new Config();

$config

	->getFinder()

	->ignoreVCSIgnored(true)

	->notPath('build')

	->notPath('l10n')

	->notPath('src')

	->notPath('vendor')

	->in(__DIR__);

return $config;

 No newline at end of file