* Dev - Implement PHPCS GitHub Action to help improve code quality.
* Fix - Sync vendor commission data with refunded order.
* Add - Logged-out users receive a notification to log in to use the vendor registration form.
* Add - New Subscription Renewal Order vendor email notification.
* Fix - `Reply-to` email goes to vendor instead of admin.
* Tweak - WC 7.2.1 compatibility.