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-connection-string/index.d.ts

@@ -0,0 +1,36 @@
+import { ClientConfig } from 'pg'
+
+export function parse(connectionString: string, options?: Options): ConnectionOptions
+
+export interface Options {
+  // Use libpq semantics when interpreting the connection string
+  useLibpqCompat?: boolean
+}
+
+interface SSLConfig {
+  ca?: string
+  cert?: string | null
+  key?: string
+  rejectUnauthorized?: boolean
+}
+
+export interface ConnectionOptions {
+  host: string | null
+  password?: string
+  user?: string
+  port?: string | null
+  database: string | null | undefined
+  client_encoding?: string
+  ssl?: boolean | string | SSLConfig
+
+  application_name?: string
+  fallback_application_name?: string
+  options?: string
+  keepalives?: number
+
+  // We allow any other options to be passed through
+  [key: string]: unknown
+}
+
+export function toClientConfig(config: ConnectionOptions): ClientConfig
+export function parseIntoClientConfig(connectionString: string): ClientConfig