Add platform invoices API with item templates and optional name.

Super admins can manage predefined invoice lines and issue invoices to businesses; schema is ready for future business-scoped use.

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

src/app.module.ts

@@ -31,6 +31,7 @@ import { BrandsModule } from './brands/brands.module';
 import { WebsiteModule } from './website/website.module';
 import { InternalSslModule } from './internal-ssl/internal-ssl.module';
 import { WebsiteDocsModule } from './website-docs/website-docs.module';
+import { InvoicesModule } from './invoices/invoices.module';
 
 @Module({
   imports: [
@@ -66,6 +67,7 @@ import { WebsiteDocsModule } from './website-docs/website-docs.module';
     BrandsModule,
     WebsiteModule,
     WebsiteDocsModule,
+    InvoicesModule,
   ],
 })
 export class AppModule {}