docs: revise commerce modules overview pages (#10738)

* revise API Key Module overview

* revise auth module

* support ref sidebar items

* remove examples

* revise cart module

* revise currency

* revise customer module

* revise fulfillment module

* revise inventory module

* revise order module

* revise payment

* revise pricing module

* revise product module

* revise promotion module

* revise region module

* revise sales channel module

* revise stock location module

* revise store module

* revise tax module

* revise user module

* lint content + fix snippets

www/packages/docs-ui/src/components/Sidebar/Item/index.tsx

@@ -30,6 +30,7 @@ export const SidebarItem = ({
     case "sub-category":
       return <SidebarItemSubCategory item={item} {...props} />
     case "link":
+    case "ref":
       return <SidebarItemLink item={item} {...props} />
     case "separator":
       return <DottedSeparator />

www/packages/docs-ui/src/components/Sidebar/index.tsx

@@ -1,7 +1,7 @@
 "use client"
 
 import React, { Suspense, useMemo, useRef } from "react"
-import { useSidebar } from "@/providers"
+import { isSidebarItemLink, useSidebar } from "@/providers"
 import clsx from "clsx"
 import { Loading } from "@/components"
 import { SidebarItem } from "./Item"
@@ -139,7 +139,7 @@ export const Sidebar = ({
                     const itemKey =
                       item.type === "separator"
                         ? index
-                        : item.type === "link"
+                        : isSidebarItemLink(item)
                           ? `${item.path}-${index}`
                           : `${item.title}-${index}`
                     return (