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

package-lock.json

@@ -26240,6 +26240,19 @@
         }
       }
     },
+    "node_modules/zx": {
+      "version": "8.8.5",
+      "resolved": "https://registry.npmjs.org/zx/-/zx-8.8.5.tgz",
+      "integrity": "sha512-SNgDF5L0gfN7FwVOdEFguY3orU5AkfFZm9B5YSHog/UDHv+lvmd82ZAsOenOkQixigwH2+yyH198AwNdKhj+RA==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "bin": {
+        "zx": "build/cli.js"
+      },
+      "engines": {
+        "node": ">= 12.17.0"
+      }
+    },
     "packages/app": {
       "name": "@paseo/app",
       "version": "1.0.0",
@@ -26355,14 +26368,17 @@
       "dependencies": {
         "@paseo/server": "*",
         "chalk": "^5.3.0",
-        "commander": "^12.0.0"
+        "commander": "^12.0.0",
+        "ws": "^8.14.2"
       },
       "bin": {
         "paseo": "bin/paseo"
       },
       "devDependencies": {
+        "@types/ws": "^8.5.8",
         "tsx": "^4.6.0",
-        "typescript": "^5.2.2"
+        "typescript": "^5.2.2",
+        "zx": "^8.8.5"
       }
     },
     "packages/cli/node_modules/chalk": {