Add runtime selection feature between Bun and Node.js

apps/cli/src/prompts/runtime.ts

@@ -0,0 +1,31 @@
+import { cancel, isCancel, select } from "@clack/prompts";
+import pc from "picocolors";
+import type { Runtime } from "../types";
+
+export async function getRuntimeChoice(runtime?: Runtime): Promise<Runtime> {
+	if (runtime !== undefined) return runtime;
+
+	const response = await select<Runtime>({
+		message: "Which runtime would you like to use?",
+		options: [
+			{
+				value: "bun",
+				label: "Bun",
+				hint: "Fast all-in-one JavaScript runtime",
+			},
+			{
+				value: "node",
+				label: "Node.js",
+				hint: "Traditional Node.js runtime",
+			},
+		],
+		initialValue: "bun",
+	});
+
+	if (isCancel(response)) {
+		cancel(pc.red("Operation cancelled"));
+		process.exit(0);
+	}
+
+	return response;
+}