feat: migrate Coupons, Access, Customers, Licenses pages to full DataTable

Update all admin listing pages to use the full-featured DataTable component:

Coupons page:
- All columns (ID, code, type, amount, usages, date limit, status)
- Status filter (All, Active, Inactive)
- Inline actions and bulk delete
- Add New modal

Access page:
- All columns (ID, title, product, status, date)
- Status filter (All, Published, Draft)
- Inline actions and bulk delete
- Add New modal

Customers page:
- All columns (ID, name, email, phone, total orders, date)
- Read-only (no selection or inline actions)
- Search and pagination

Licenses page:
- All columns (ID, license key, product, order, email, status)
- Status labels (Active, Inactive, Expired)
- Read-only (no selection or inline actions)
- Search and pagination

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-icons/build/arrow-left', 'wp-icons/build/bell', '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' => '164b137f81dde0451242');
+<?php return array('dependencies' => array('react', 'wp-components', 'wp-element', 'wp-i18n', 'wp-icons/build/arrow-left', 'wp-icons/build/bell', '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' => 'ea8676d843297ad5e987');