Add a default configuration for the library

• Serialization: default serializers that should be used for every DTO.
• Logger: should we log warnings and erros, if so, what's the minimum level, and what Logger are we gonna use.

Add DTO fields transformation: A general way of transforming field when hydrating/serializing
E.g (from snake_case to camelCase)
Field transformers are applied at the class level: can also have the ability to ignore fields.

Updating configuration to include the ability to apply a global field transform for all the DTOs.

Add serializers and normalizers using attributes