docs: add product feed tutorial (#13366)

www/apps/resources/generated/generated-commerce-modules-sidebar.mjs

@@ -11754,6 +11754,14 @@ const generatedgeneratedCommerceModulesSidebarSidebar = {
               "path": "https://docs.medusajs.com/resources/examples/guides/custom-item-price",
               "children": []
             },
+            {
+              "loaded": true,
+              "isPathHref": true,
+              "type": "ref",
+              "title": "Implement Meta Product Feed",
+              "path": "https://docs.medusajs.com/resources/how-to-tutorials/tutorials/product-feed",
+              "children": []
+            },
             {
               "loaded": true,
               "isPathHref": true,