add readme

Author: GiancarloCode

README.md

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+# flutter_intl_example
+
+🔥🚀 I teach you how to Internationalize and localize your Flutter App easily using [Flutter Intl](https://marketplace.visualstudio.com/items?itemName=localizely.flutter-intl) extension for VS Code and [Flutter Intl](https://plugins.jetbrains.com/plugin/13666-flutter-intl) plugin for IntelliJ / Android Studio.
+
+🔥🚀 Also I teach you how to change the language and locale from the App using [provider](https://pub.dev/packages/provider) package and [flutter_bloc](https://pub.dev/packages/flutter_bloc) package.