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/payment/module-options/page.mdx

@@ -124,7 +124,7 @@ module.exports = defineConfig({
         ],
       },
     },
-  }
+  },
 })
 ```
 

www/apps/resources/app/commerce-modules/payment/payment-provider/stripe/page.mdx

@@ -60,14 +60,14 @@ module.exports = defineConfig({
                       apiKey: process.env.STRIPE_USD_API_KEY,
                     },
                   },
-                }
-              }
+                },
+              },
             },
           },
         ],
       },
     },
-  }
+  },
 })
 ```