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

contents/docs/marketing/wishlist.md

@@ -0,0 +1,13 @@
+---
+title: Wishlist
+description: Let customers save products.
+---
+
+# Wishlist
+
+Enable the heart icon on your products.
+
+## How it works
+*   **Guest Support**: Guests can save items (stored in cookies/local storage).
+*   **Account Sync**: When guests log in, their wishlist is saved to their account.
+*   **Sharing**: Customers can share their wishlist via social media or email.