docs: create returns from storefront tutorial (#13522)

* docs: create returns from storefront tutorial

* small change

* generate llms

* add location ID

www/apps/resources/generated/generated-storefront-development-sidebar.mjs

@@ -51,6 +51,14 @@ const generatedgeneratedStorefrontDevelopmentSidebarSidebar = {
           "path": "/storefront-development/guides/express-checkout",
           "title": "Express Checkout Storefront",
           "children": []
+        },
+        {
+          "loaded": true,
+          "isPathHref": true,
+          "type": "ref",
+          "path": "/nextjs-starter/guides/storefront-returns",
+          "title": "Create Returns from Storefront",
+          "children": []
         }
       ]
     },