Add test:watch NPM script

Author: aryaemami59

packages/toolkit/package.json

@@ -101,6 +101,7 @@
     "format:check": "prettier --list-different \"(src|examples)/**/*.{ts,tsx}\" \"docs/*/**.md\"",
     "lint": "eslint src examples",
     "test": "vitest --run",
+    "test:watch": "vitest --watch",
     "type-tests": "yarn tsc -p src/tests/tsconfig.typetests.json && yarn tsc -p src/query/tests/tsconfig.typetests.json",
     "prepack": "yarn build"
   },