add watch script

Author: mattzcarey

package.json

@@ -5,7 +5,8 @@
   "scripts": {
     "start": "tsx src/runner.ts",
     "test:server": "tsx src/server-runner.ts",
-    "test": "vitest",
+    "test": "vitest run",
+    "test:watch": "vitest",
     "lint": "eslint src/ && prettier --check .",
     "lint:fix": "eslint src/ --fix && prettier --write .",
     "lint:fix_check": "npm run lint:fix && git diff --exit-code --quiet"