This PR contains the work on implementing some public interfaces that were forgotten during the development of this app and, of course, improves the text of the README file a bit more.
To give further details about the work done:
- [x] implemented the `Service` protocol in the `Persistence` library and conformed the `PersistenceService` service to it;
- [x] implemented the `Service` protocol in the `Remote` library and conformed the `RemoteService` service to it;
- [x] implemented the `Application` protocol in the `Core` library and conformed the `UIApplication` class to it;
- [x] improved the dependency keys used by the `DependencyService` service to use these protocols instead;
- [x] tweaked the text of the README file.
Co-authored-by: Javier Cicchelli <javier@rock-n-code.com>
Reviewed-on: rock-n-code/deep-linking-assignment#14
Javier Cicchelli
1de87263ba