docs: added customer storefront guides (#7685)

* added customer guides

* fixes to sidebar

* remove old customer registration guide

* fix build error

* generate files

* run linter

www/apps/resources/app/commerce-modules/product/examples/page.mdx

@@ -213,7 +213,7 @@ In this guide, you’ll find common examples of how you can use the Product Modu
       request.scope.resolve(ModuleRegistrationName.PRODUCT)
 
     const data = await productModuleService.list({
-      handle: "shirt"
+      handle: "shirt",
     })
 
     res.json({ product: data[0] })
@@ -234,7 +234,7 @@ In this guide, you’ll find common examples of how you can use the Product Modu
     const productModuleService = await initializeProductModule()
 
     const data = await productModuleService.list({
-      handle: "shirt"
+      handle: "shirt",
     })
 
     return NextResponse.json({ product: data[0] })