docs: revise commerce modules overview pages (medusajs#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/apps/resources/app/commerce-modules/api-key/links-to-other-modules/page.mdx

@@ -37,8 +37,8 @@ To retrieve the sales channels of an API key with [Query](!docs!/learn/fundament
 const { data: apiKeys } = await query.graph({
   entity: "api_key",
   fields: [
-    "sales_channels.*"
-  ]
+    "sales_channels.*",
+  ],
 })
 
 // apiKeys.sales_channels
@@ -55,8 +55,8 @@ import { useQueryGraphStep } from "@medusajs/medusa/core-flows"
 const { data: apiKeys } = useQueryGraphStep({
   entity: "api_key",
   fields: [
-    "sales_channels.*"
-  ]
+    "sales_channels.*",
+  ],
 })
 
 // apiKeys.sales_channels