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/split2/bench.js

@@ -0,0 +1,27 @@
+'use strict'
+
+const split = require('./')
+const bench = require('fastbench')
+const binarySplit = require('binary-split')
+const fs = require('fs')
+
+function benchSplit (cb) {
+  fs.createReadStream('package.json')
+    .pipe(split())
+    .on('end', cb)
+    .resume()
+}
+
+function benchBinarySplit (cb) {
+  fs.createReadStream('package.json')
+    .pipe(binarySplit())
+    .on('end', cb)
+    .resume()
+}
+
+const run = bench([
+  benchSplit,
+  benchBinarySplit
+], 10000)
+
+run(run)