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-protocol/dist/parser.d.ts

@@ -0,0 +1,39 @@
+/// <reference types="node" />
+/// <reference types="node" />
+import { TransformOptions } from 'stream';
+import { Mode, BackendMessage } from './messages';
+export declare type Packet = {
+    code: number;
+    packet: Buffer;
+};
+declare type StreamOptions = TransformOptions & {
+    mode: Mode;
+};
+export declare type MessageCallback = (msg: BackendMessage) => void;
+export declare class Parser {
+    private buffer;
+    private bufferLength;
+    private bufferOffset;
+    private reader;
+    private mode;
+    constructor(opts?: StreamOptions);
+    parse(buffer: Buffer, callback: MessageCallback): void;
+    private mergeBuffer;
+    private handlePacket;
+    private parseReadyForQueryMessage;
+    private parseCommandCompleteMessage;
+    private parseCopyData;
+    private parseCopyInMessage;
+    private parseCopyOutMessage;
+    private parseCopyMessage;
+    private parseNotificationMessage;
+    private parseRowDescriptionMessage;
+    private parseField;
+    private parseParameterDescriptionMessage;
+    private parseDataRowMessage;
+    private parseParameterStatusMessage;
+    private parseBackendKeyData;
+    parseAuthenticationResponse(offset: number, length: number, bytes: Buffer): any;
+    private parseErrorMessage;
+}
+export {};