TurboWriteable class abstract

A base class for objects that can be written to Firestore.

This abstract class provides the foundation for objects that need to be stored in Firestore. It enforces validation and serialization requirements through two key methods:

• validate for ensuring data integrity before writing
• toJson for converting the object to a Firestore-compatible format

Example:

class User extends TurboWriteable {
  User({required this.name, required this.age});

  final String name;
  final int age;

  @override
  TurboResponse<void>? validate<void>() {
    if (name.isEmpty) {
      return TurboResponse.fail(message: 'Name cannot be empty');
    }
    if (age < 0) {
      return TurboResponse.fail(message: 'Age cannot be negative');
    }
    return null;
  }

  @override
  Map<String, dynamic> toJson() => {
    'name': name,
    'age': age,
  };
}