docs: add how-to guides for retrieving cart and order totals (#13044)

www/apps/resources/generated/generated-how-to-tutorials-sidebar.mjs

@@ -142,6 +142,22 @@ const generatedgeneratedHowToTutorialsSidebarSidebar = {
               "path": "https://docs.medusajs.com/resources/commerce-modules/auth/reset-password",
               "children": []
             },
+            {
+              "loaded": true,
+              "isPathHref": true,
+              "type": "ref",
+              "title": "Retrieve Cart Totals",
+              "path": "https://docs.medusajs.com/resources/commerce-modules/cart/cart-totals",
+              "children": []
+            },
+            {
+              "loaded": true,
+              "isPathHref": true,
+              "type": "ref",
+              "title": "Retrieve Order Totals",
+              "path": "https://docs.medusajs.com/resources/commerce-modules/order/order-totals",
+              "children": []
+            },
             {
               "loaded": true,
               "isPathHref": true,