docs: add missing configuration pages and remove redundant H1 headers

contents/docs/configuration/email/index.mdx

@@ -0,0 +1,17 @@
+---
+title: Email Settings
+description: Transactional emails and SMTP.
+---
+
+
+
+WooNooW replaces default WooCommerce emails with beautiful, responsive templates.
+
+## Template Editor
+Go to **Settings > Email** to customize:
+*   **Order Confirmation**
+*   **Shipping Updates**
+*   **Account Notifications**
+
+## SMTP Configuration
+Ensure your emails hit the inbox, not spam. We recommend using a dedicated SMTP service like SendGrid or Postmark.