add: php composer management

vendor/composer/installers/src/Composer/Installers/StarbugInstaller.php

@@ -0,0 +1,14 @@
+<?php
+
+namespace Composer\Installers;
+
+class StarbugInstaller extends BaseInstaller
+{
+    /** @var array<string, string> */
+    protected $locations = array(
+        'module' => 'modules/{$name}/',
+        'theme' => 'themes/{$name}/',
+        'custom-module' => 'app/modules/{$name}/',
+        'custom-theme' => 'app/themes/{$name}/'
+    );
+}