[SBS] Updated code structure and removed MAVLink submodule

.gitmodules

CMakeLists.txt

ExtraResources/lynx-1.png

ExtraResources/overview_rocket.svg

Modules/Mavlink/mavlink_skyward_lib

application.qrc

src/entrypoints/groundstation/application.qrc

src/entrypoints/groundstation/assets/icons/SkywardHub.icns

src/entrypoints/groundstation/assets/icons/SkywardHub.ico

src/entrypoints/groundstation/assets/icons/SkywardHub.png

...points/groundstation/assets/icons/splitter_horizontal.png

...rypoints/groundstation/assets/icons/splitter_vertical.png

src/entrypoints/groundstation/assets/styles/global.qss

src/entrypoints/groundstation/main.cpp

.../Components/ContextMenuSeparator/contextmenuseparator.cpp

...ed/Components/ContextMenuSeparator/contextmenuseparator.h

src/shared/Components/ErrorDisplayer/error.cpp

src/shared/Components/ErrorDisplayer/error.h

src/shared/Components/ErrorDisplayer/errordisplayer.cpp

src/shared/Components/ErrorDisplayer/errordisplayer.h