* refactor(Notification): use instance methods
* refactor(Audio): move to lib layer
* refactor(EncryptionService): rename instance to encryption
* refactor(ConnectionTest): move to lib
* refactor(FileTransfer): move to lib
* refactor(PeerRoom): move to lib
* refactor(sleep): move to lib
* refactor(type-guards): move to lib
* refactor(SerializationService): use standard instance name
* refactor(SettingsService): use standard instance name