chore: init frontend-source directory with tooling scaffold

Former-commit-id: 435fb8e3e4f8e334ad3b0e95052edbdd9547d197

frontend-source/scripts/node_modules/semver/functions/clean.js

@@ -0,0 +1,8 @@
+'use strict'
+
+const parse = require('./parse')
+const clean = (version, options) => {
+  const s = parse(version.trim().replace(/^[=v]+/, ''), options)
+  return s ? s.version : null
+}
+module.exports = clean