fix: override projectRoot in CS Fixer finder with getcwd()

The PHAR-based fallback in php_cs.php computes projectRoot by going
5 levels up from configDefaults/generic/. This works when php-qa-ci
is installed as a dependency but goes too far when the library IS
the root project. Use getcwd() in the library's own finder override.

Also broadened exclusion from tests/assets/psr4 to tests/assets
and added ignoreVCSIgnored for consistency.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: LTSCommerce

qaConfig/php_cs_finder.php

@@ -1,16 +1,19 @@
 <?php
 
 declare(strict_types=1);
-if (isset($GLOBALS['projectRoot'])) {
-    throw new RuntimeException('$projectRoot must be defined and must be a valid path to the project root');
-}
+
+// Override $projectRoot from parent scope — the PHAR-based fallback in php_cs.php
+// computes the wrong path when the library IS the root project (goes too many levels up).
+// Use the actual working directory instead.
+$projectRoot = getcwd() ?: $projectRoot;
 
 return (new PhpCsFixer\Finder())
     ->in($projectRoot)
     ->exclude(
         [
             'var',
-            'tests/assets/psr4',
+            'tests/assets',
         ]
     )
+    ->ignoreVCSIgnored(true)
 ;