Organize files in project

Sources/XXClient/Functions/NewCMix.swift

Sources/XXClient/Functions/NewCMixFromBackup.swift

Sources/XXClient/Functions/NewDummyTrafficManager.swift

Sources/XXClient/Functions/NewGroupChat.swift

Sources/XXClient/Functions/NewOrLoadUd.swift

Sources/XXClient/Functions/NewUdManagerFromBackup.swift

Sources/XXClient/Functions/RegisterForNotifications.swift

Sources/XXClient/Functions/RegisterLogWriter.swift

Sources/XXClient/Functions/RequestRestlike.swift

Sources/XXClient/Functions/RestlikeRequest.swift

Sources/XXClient/Functions/ResumeBackup.swift

Sources/XXClient/Functions/SearchUD.swift

Sources/XXClient/Functions/SetFactsOnContact.swift

Sources/XXClient/Functions/SetLogLevel.swift

Sources/XXClient/Functions/StoreReceptionIdentity.swift

Sources/XXClient/Functions/TransmitSingleUse.swift

Sources/XXClient/Functions/UnregisterForNotifications.swift

Sources/XXClient/Functions/UpdateCommonErrors.swift

Sources/XXClient/Group/Functions/GroupGetCreatedMS.swift

Sources/XXClient/Group/Functions/GroupGetCreatedNano.swift