add .nvmrc for Node version and update package.json to include babel-preset-expo

.nvmrc

@@ -0,0 +1,2 @@
+20.19.4
+

package.json

@@ -36,7 +36,8 @@
     "react-native-worklets": "0.5.1"
   },
   "devDependencies": {
-    "@babel/core": "^7.29.0"
+    "@babel/core": "^7.29.0",
+    "babel-preset-expo": "~12.0.0"
   },
   "private": true
 }