[Request] To add Annotation for default value

[mustafaG9]

Hello ,

I think this feature must be included in this package (Default value)

for example :

@entity
class User {
  @primaryKey
  final int id;

  final String name;

  @ColumnInfo(defaultValue: 'Guest')
  final String role;

  User({this.id, required this.name, this.role = 'Guest'});
}