WooCommerce + PayKrypt: plugin, webhook, and refund flow

WooCommerce merchants can treat PayKrypt as a plugin path around the same Payment Intents API. The store creates the payment, the customer pays on hosted checkout, and WooCommerce state changes after webhook verification.

The plugin settings should be tied to dashboard API keys and a webhook endpoint. Refund behavior remains a separate API flow and must follow the merchant refund policy.