chore: add comment for layerPattern() definition

Author: samsonasik

structarmed.php

@@ -48,7 +48,7 @@
     ])
     ->cacheDirectory(is_dir('/tmp') ? '/tmp/structarmed' : null)
     ->withPreset(Preset::PSR4())
-
+    // Resolve CodeIgniter layers from class names because several layers share directories.
     ->layerPattern('API', '/^CodeIgniter\\\\API\\\\.*$/')
     ->layerPattern('Cache', '/^CodeIgniter\\\\Cache\\\\.*$/')
     ->layerPattern('Controller', '/^CodeIgniter\\\\Controller$/')