feat: restructure docs into store, marketing, builder, and config sections

contents/docs/configuration/index.md

@@ -0,0 +1,16 @@
+---
+title: Configuration
+description: Configure every aspect of your store.
+---
+
+# Configuration
+
+Fine-tune your store's behavior and appearance.
+
+## Settings Areas
+
+*   **[General](/docs/configuration/general)**: SPA Mode, Container Width, Typography.
+*   **[Appearance](/docs/configuration/appearance)**: Theme colors and branding.
+*   **[Modules](/docs/configuration/modules)**: Enable or disable specific features to keep your store lightweight.
+*   **[Email](/docs/configuration/email)**: Customize transactional emails and set up SMTP.
+*   **[Security](/docs/configuration/security)**: Protect your store with built-in security features.