add services && controller && first configuration tree builder

BillingBundle/Controller/BillingController.php

@@ -0,0 +1,16 @@
+<?php
+
+namespace Bluesquare\BillingBundle\Controller;
+
+use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
+
+class BillingController extends AbstractController
+{
+    /**
+     * @Route("/bluesquare/billing-bundle/webhook", name="bluesquare.billing_bundle.webhook")
+    */
+    public function webhook()
+    {
+
+    }
+}