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/pg-pool/esm/index.mjs

@@ -0,0 +1,5 @@
+// ESM wrapper for pg-pool
+import Pool from '../index.js'
+
+// Export as default only to match CJS module
+export default Pool