Make server listing and single server view API endpoints work

app/Transformers/Api/Application/EggVariableTransformer.php

@@ -0,0 +1,13 @@
+<?php
+
+namespace Pterodactyl\Transformers\Api\Application;
+
+use Pterodactyl\Models\EggVariable;
+
+class EggVariableTransformer extends BaseTransformer
+{
+    public function transform(EggVariable $model)
+    {
+        return $model->toArray();
+    }
+}