add dotenv as dedicated dev dependency and use async iterator polyfill

Author: LucDeCaf

demos/react-native-supabase-group-chat/package.json

@@ -23,7 +23,6 @@
     "@expo/vector-icons": "^15.0.3",
     "@faker-js/faker": "^10.1.0",
     "@journeyapps/react-native-quick-sqlite": "^2.4.11",
-    "@powersync/attachments": "^2.4.1",
     "@powersync/react-native": "^1.27.1",
     "@react-native-async-storage/async-storage": "2.2.0",
     "@react-navigation/bottom-tabs": "^7.4.0",
@@ -33,7 +32,6 @@
     "@supabase/supabase-js": "^2.86.0",
     "@tamagui/babel-plugin": "^1.138.6",
     "@tamagui/shorthands": "^1.138.6",
-    "@tamagui/config": "^1.138.6",
     "@tamagui/core": "^1.138.6",
     "@tamagui/lucide-icons": "^1.138.6",
     "@tamagui/themes": "^1.138.6",
@@ -68,12 +66,10 @@
   },
   "devDependencies": {
     "@babel/plugin-transform-async-generator-functions": "^7.28.0",
+    "dotenv": "^17.2.3",
     "@types/react": "~19.1.17",
     "eslint": "^9.25.0",
     "eslint-config-expo": "~10.0.0",
-    "prettier": "^3.7.4",
-    "prettier-plugin-embed": "^0.5.0",
-    "prettier-plugin-sql": "^0.19.2",
     "typescript": "~5.9.2"
   },
   "license": "UNLICENSED",