chore: add prettier

Author: jscottsmith

package.json

@@ -101,6 +101,7 @@
     "jsdom": "^27.0.0",
     "np": "^7.7.0",
     "postcss": "^8",
+    "prettier": "^3.6.2",
     "react": "^17.0.2",
     "react-dom": "^17.0.2",
     "react-hooks-testing-library": "^0.6.0",