Offline QR Payment Gateway (IRIS)

Offline QR Payment Gateway (IRIS) adds a payment method for WooCommerce that shows a QR code and instructions. The order is placed on hold (or pending) until payment is confirmed.

Features:
* Offline QR method (e.g. IRIS)
* Admin media uploader for QR image
* Compatible with both Classic Checkout and WooCommerce Cart/Checkout Blocks
* “Unavailable state” toggle: method stays visible but cannot be selected
* Optional unavailable message shown under the method and as a tooltip
* Email injection for unpaid orders (CID inline QR + clickable link)
* My Account order view block for unpaid orders
* Optional uninstall cleanup