variant options coming along - add test passing

templates/ProductCategoryVariantOptions/add.php

@@ -0,0 +1,20 @@
+<?php
+
+use App\View\AppView;
+use Cake\Datasource\EntityInterface;
+
+/**
+ * @var AppView $this
+ * @var EntityInterface $productCategoryAttributeOption
+ */
+
+$this->setLayout('ajax');
+$prefix = $prefix ?? '';
+if ($this->request->getQuery('prefix') !== null) {
+    $prefix = 'product_category_variant_options.' . $this->request->getQuery('prefix') . '.';
+}
+echo '<hr class="my-2">';
+echo $this->element('ProductCategoryVariants/product_category_variant_option_form', [
+    'prefix' => $prefix
+]);
+?>