printUsage method

@override void printUsage()

Display env_builder_cli usage

Implementation

@override
void printUsage() {
  print('''
Usage:
env_builder --env-file=.env.development,.env.production,.env.staging

Description:
Automates creation or update of the env Flutter package inside packages/env
by copying specified .env files, generating Dart code with Envied,
updating dependencies, and running flutter pub get automatically.
''');
}