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/buffer-reader.d.ts

@@ -0,0 +1,15 @@
+/// <reference types="node" />
+export declare class BufferReader {
+    private offset;
+    private buffer;
+    private encoding;
+    constructor(offset?: number);
+    setBuffer(offset: number, buffer: Buffer): void;
+    int16(): number;
+    byte(): number;
+    int32(): number;
+    uint32(): number;
+    string(length: number): string;
+    cstring(): string;
+    bytes(length: number): Buffer;
+}