Merge branch 'dev/refactor' into 'development'

Sources/XXClient/Callbacks/BroadcastListener.swift

Sources/XXClient/Callbacks/ClientErrorCallback.swift

...ces/XXClient/Callbacks/FileTransferProgressCallback.swift

Sources/XXClient/Callbacks/GroupChatProcessor.swift

Sources/XXClient/Callbacks/GroupRequest.swift

Sources/XXClient/Callbacks/HealthCallback.swift

Sources/XXClient/Callbacks/Listener.swift

Sources/XXClient/Callbacks/LogWriter.swift

Sources/XXClient/Callbacks/MessageDeliveryCallback.swift

Sources/XXClient/Callbacks/Processor.swift

Sources/XXClient/Callbacks/ReceiveFileCallback.swift

Sources/XXClient/Callbacks/RestlikeCallback.swift

Sources/XXClient/Callbacks/SingleUseCallback.swift

Sources/XXClient/Callbacks/SingleUseResponse.swift

Sources/XXClient/Callbacks/UdLookupCallback.swift

Sources/XXClient/Callbacks/UdNetworkStatus.swift

Sources/XXClient/Callbacks/UdSearchCallback.swift

Sources/XXClient/Callbacks/UpdateBackupFunc.swift

Sources/XXClient/Channel/Channel.swift

Sources/XXClient/Channel/Functors/ChannelBroadcast.swift