Add product variants API, deployment scripts, and documentation

- Add Node.js variant-api server with PostgreSQL integration
- Add new utility scripts for system verification and website status
- Update CI/CD workflow configuration
- Add color variant solution documentation
- Add product variants JavaScript support
- Update gitignore for new build artifacts

variant-api/node_modules/postgres-array/index.d.ts

@@ -0,0 +1,4 @@
+
+export function parse(source: string): string[];
+export function parse<T>(source: string, transform: (value: string) => T): T[];
+