chore(deps): Switch back to React 18

Author: ball-hayden

example/package.json

@@ -16,7 +16,7 @@
     "expo-document-picker": "13.0.1",
     "expo-splash-screen": "0.29.18",
     "lodash": "4.17.21",
-    "react": "19.0.0",
+    "react": "18.3.1",
     "react-native": "0.76.3",
     "react-native-ble-plx": "3.2.1",
     "react-native-toast-message": "2.2.1"