Add public user-products storefront API and website docs.

Expose published customer listings under /tenants/:host/user-products (list, search, details, technical-info) and document them in the website API pack.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/app.module.ts

@@ -28,6 +28,7 @@ import { CustomersModule } from './customers/customers.module';
 import { ShoppingCardsModule } from './shopping-cards/shopping-cards.module';
 import { ContactSubmissionsModule } from './contact-submissions/contact-submissions.module';
 import { FavoritesModule } from './favorites/favorites.module';
+import { UserProductsModule } from './user-products/user-products.module';
 import { BrandsModule } from './brands/brands.module';
 import { WebsiteModule } from './website/website.module';
 import { InternalSslModule } from './internal-ssl/internal-ssl.module';
@@ -69,6 +70,7 @@ import { PublicSmsModule } from './public-sms/public-sms.module';
     ShoppingCardsModule,
     ContactSubmissionsModule,
     FavoritesModule,
+    UserProductsModule,
     BrandsModule,
     WebsiteModule,
     WebsiteDocsModule,