[Qt6] Updated codebase to Qt6

CMakeLists.txt

src/main.cpp

src/shared/Components/ErrorDisplayer/Error.cpp

src/shared/Components/ToggleButton/ToggleButton.cpp

src/shared/Components/ToggleButton/ToggleButton.h

src/shared/Core/Message/Field.cpp

src/shared/Core/Message/Topic.cpp

src/shared/Core/QCustomPlot/QCustomPlot.h

src/shared/Core/SkywardHubCore.cpp

src/shared/Core/XmlObject.cpp

src/shared/Core/XmlObject.h

src/shared/Modules/CompactCommandPad/CommandSelector.cpp

src/shared/Modules/Mavlink/BaseMavlinkModule.h

...d/Modules/OrientationVisualizer/OrientationVisualizer.cpp

...red/Modules/OrientationVisualizer/OrientationVisualizer.h

...s/OutgoingMessagesViewer/OutgoingMessagesViewerModule.cpp