Rename plugins to libs and update all file references

libs/stripe-php/lib/Application.php

@@ -0,0 +1,15 @@
+<?php
+
+// File generated from our OpenAPI spec
+
+namespace Stripe;
+
+/**
+ * @property string $id Unique identifier for the object.
+ * @property string $object String representing the object's type. Objects of the same type share the same value.
+ * @property null|string $name The name of the application.
+ */
+class Application extends ApiResource
+{
+    const OBJECT_NAME = 'application';
+}