docs: added custom item price guide (#11240)

* added examples sidebar

* added guide

* fixes

* add meta image

* update intro

www/apps/resources/sidebar.mjs

@@ -25,6 +25,7 @@ import { taxSidebar } from "./sidebars/tax.mjs"
 import { troubleshootingSidebar } from "./sidebars/troubleshooting.mjs"
 import { userSidebar } from "./sidebars/user.mjs"
 import { sidebarAttachHrefCommonOptions } from "./utils/sidebar-attach-common-options.mjs"
+import { examplesSidebar } from "./sidebars/examples.mjs"
 
 /** @type {import('types').RawSidebarItem[]} */
 export const sidebar = sidebarAttachHrefCommonOptions([
@@ -33,11 +34,7 @@ export const sidebar = sidebarAttachHrefCommonOptions([
     path: "/",
     title: "Overview",
   },
-  {
-    type: "link",
-    path: "/examples",
-    title: "Examples",
-  },
+  ...examplesSidebar,
   {
     type: "link",
     path: "/recipes",