Add local persistence to any RxSwift observable
If we have an observable that loads some Codable data, such as a network API call to some service, we can locally cache the last returned result on disk by calling .persist(key) on the Observable.
let account = apiClient.loadAccount()
.persist("some_unique_key_for_this_data")
The latest value of the observable is cached and serialized to disk when the app goes to a background state, and loaded from disk or memory at observable creation.
To be determined