Add php-cs check

Signed-off-by: Julius Härtl <jus@bitgrid.net>

.php_cs.dist

@@ -0,0 +1,18 @@
+<?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;