feat(cli): add onboard alias for setup wizard

src/cli/onboard.ts

@@ -0,0 +1,14 @@
+import type { Command } from 'commander';
+import { getConfigPath } from './shared.js';
+import { runSetup } from './setup.js';
+
+export function registerOnboardCommand(program: Command): void {
+  program
+    .command('onboard')
+    .description('Run guided onboarding (alias for setup wizard)')
+    .option('-c, --config <path>', 'Config file path')
+    .action(async (opts: { config?: string }) => {
+      const configPath = opts.config ?? getConfigPath();
+      await runSetup(configPath);
+    });
+}