test(cli): add zx TDD infrastructure and phase 1 tests

- Install zx as devDependency for E2E testing
- Create tests/ directory with setup utilities
- Add setup.ts with test context helpers:
  - Random port generation (never 6767)
  - Temp directory creation for PASEO_HOME and workDir
  - Daemon startup/waitForDaemon helper (WebSocket only)
  - Cleanup function
  - paseo() helper to run CLI commands against test daemon
- Add Phase 1 foundation tests (01-foundation.test.mts):
  - Test paseo --version outputs version
  - Test paseo --help shows commands
- Add test runner (run-all.mts) that discovers and runs all tests
- Add test:e2e script to package.json

packages/cli/src/commands/daemon/stop.ts

@@ -0,0 +1,53 @@
+import { Command } from 'commander'
+import chalk from 'chalk'
+import { connectToDaemon, getDaemonHost } from '../../utils/client.js'
+
+export function stopCommand(): Command {
+  return new Command('stop')
+    .description('Stop the daemon')
+    .option('--host <host>', 'Daemon host:port (default: localhost:6767)')
+    .action(async (options: { host?: string }) => {
+      await runStop(options)
+    })
+}
+
+async function runStop(options: { host?: string }): Promise<void> {
+  const host = getDaemonHost(options)
+
+  let client
+  try {
+    client = await connectToDaemon(options)
+  } catch {
+    console.log(chalk.yellow('Daemon is not running'))
+    console.log(chalk.dim(`Tried to connect to ${host}`))
+    process.exit(0)
+  }
+
+  try {
+    console.log(chalk.dim('Stopping daemon...'))
+
+    // Request server restart with "shutdown" reason
+    // This signals the daemon to shut down gracefully
+    await client.restartServer('cli_shutdown')
+
+    // Give the daemon a moment to acknowledge
+    await new Promise(resolve => setTimeout(resolve, 500))
+
+    console.log(chalk.green('Daemon stop requested'))
+    console.log(chalk.dim('The daemon will shut down gracefully'))
+
+    await client.close()
+  } catch (err) {
+    await client.close().catch(() => {})
+    const message = err instanceof Error ? err.message : String(err)
+
+    // If connection was closed, the daemon is stopping
+    if (message.includes('closed') || message.includes('disconnected')) {
+      console.log(chalk.green('Daemon is stopping'))
+      process.exit(0)
+    }
+
+    console.error(chalk.red(`Failed to stop daemon: ${message}`))
+    process.exit(1)
+  }
+}