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/architectural-modules/notification/local/page.mdx

@@ -50,7 +50,7 @@ module.exports = defineConfig({
             options: {
               config: {
                 local: {
-                  channels: ["email"]
+                  channels: ["email"],
                 },
               },
             },
@@ -58,7 +58,7 @@ module.exports = defineConfig({
         ],
       },
     },
-  }
+  },
 })
 ```