[CHG] PublishedPreference is now a struct

[FIX] ObserverRelayAdaptor is a standalone class

[IMP] Make PublishedPreference a class

[FIX] ObserverAdaptor KVO

[ADD] PublishedPreference

[ADD] DefaultsValue + documentation

[ADD] Observation for Defaults

[IMP] Clean some deprecated

Array conforms to UserDefaultCodable if Element does

[REM] Serialization protocol

[UPD] Tests

[REM] instanciate -> instantiate