feat: make road compiler standalone

bin/road-workbench.js

@@ -0,0 +1,14 @@
+#!/usr/bin/env node
+"use strict";
+
+const path = require("path");
+const { startWorkbench } = require("../workbench/server");
+
+const args = process.argv.slice(2);
+const index = args.indexOf("--input");
+if (index < 0 || !args[index + 1]) throw new Error("Usage: road-workbench --input <RoadCompilerInput.json> [--port <port>]");
+const inputFile = path.resolve(args[index + 1]);
+const input = require(inputFile);
+const portIndex = args.indexOf("--port");
+const port = portIndex >= 0 ? Number(args[portIndex + 1]) : 8787;
+startWorkbench({ input, inputFile, port });