docs: general improvements and additions (#12296)

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

@@ -110,6 +110,14 @@ const generatedgeneratedHowToTutorialsSidebarSidebar = {
               "path": "https://docs.medusajs.com/resources/references/tax/provider",
               "children": []
             },
+            {
+              "loaded": true,
+              "isPathHref": true,
+              "type": "ref",
+              "title": "Get Variant Inventory",
+              "path": "https://docs.medusajs.com/resources/commerce-modules/product/guides/variant-inventory",
+              "children": []
+            },
             {
               "loaded": true,
               "isPathHref": true,