format.cpp

- Renamed message handling to CAN routing.

- Update MqttClient to simplify and move responsibility/functionality to class encapsulating it.

- Updated MqttClient::init() to verify that the CA, certificate and key files exist before use.

- Added CloudConnectController::loadConfig() and removed the config paths from the constructor.

- Added CloudConnectController inbound cloud message handling and decoding the protobuf.

- Removed the temporary protobuf capture-to-file code and its Capture INI section.

- Updated CloudConnect.ini format.

- Added logging categories config, proto, can.routing, mqtt, mqtt.stats and comms.types, and converted the bare qInfo/qWarning calls to categorized logging.

- Updated Types::getValue() and Types::getBits() to warn when the buffer is too short.

- Updated the protobuf Header to drop deviceSerialNum.

- Updated serializeProto() and canMessageToProtobufByteArray() to return bool and write the result through a QByteArray out-parameter.

- Updated CloudConnect.pro to add the Qt Mqtt module.

- Added qmake build.

- Moved the CAN comms sources from MsgUtils to Comms: CanMessage, FrameInterface, MessageBuilder, MessageDispatcher, crc, format, main, and types.

- Renamed AgentMessage -> RtMessage and AgentInterface -> RtInterface.

- Added RtServer and updated LeahiRtController to use it.

- Added LeahiRtMsgHandling.ini for per-message drop/send_always/send_delta handling and the outbound topic from configuration.

- Updated the SDD PlantUML diagrams.