Use an Enum for project type conditions

src/Enum/ProjectType.php

@@ -0,0 +1,12 @@
+<?php
+
+declare(strict_type=1);
+
+namespace App\Enum;
+
+enum ProjectType: string
+{
+    // PHP.
+    case Drupal = 'drupal';
+    case Sculpin = 'sculpin';
+}