fix: React admin icon imports and mount point rendering

- Fix all @wordpress/icons imports - use build/ paths and call as functions
- Update all admin pages to render React mount points
- Components fixed: VariationPricingTable, NotificationLog, GlobalSettings,
  FormFieldOptions, OrderDetail, OrderListItem, OrderList, FormCanvas,
  AnalyticsDashboard, FormField, Products
- Admin pages updated: Order.php, Customer.php, Coupon.php, License.php,
  Product.php, Access.php, Form.php

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

build/admin.asset.php

@@ -1 +1 @@
-<?php return array('dependencies' => array('react', 'wp-components', 'wp-element', 'wp-i18n', 'wp-primitives'), 'version' => '45cbff321e1153724caa');
+<?php return array('dependencies' => array('react', 'wp-components', 'wp-element', 'wp-i18n', 'wp-icons/build/arrow-left', 'wp-icons/build/bell', 'wp-icons/build/chevron-down', 'wp-icons/build/chevron-up', 'wp-icons/build/eye-closed', 'wp-icons/build/eye-opened', 'wp-icons/build/list', 'wp-icons/build/message', 'wp-icons/build/minus', 'wp-icons/build/plus', 'wp-icons/build/trash', 'wp-icons/build/visible'), 'version' => '44e6bb755959bfd53a19');