Add spinner to vm stop command

src/commands/vm.ts

@@ -60,8 +60,14 @@ export function register(program: Command) {
     .command("stop")
     .description("Stop the VM")
     .action(async () => {
-      await vm.stop()
-      console.log("✔ VM stopped")
+      const spin = spinner("Stopping VM")
+      try {
+        await vm.stop()
+        spin.succeed("VM stopped")
+      } catch (err) {
+        spin.fail(String((err as Error).message ?? err))
+        process.exit(1)
+      }
     })
 
   vmCmd