[Sensortile] Added sensortile target board

.vscode/c_cpp_properties.json

CMakeLists.txt

cmake/boardcore.cmake

libs/miosix-kernel

src/entrypoints/sensortile-entry.cpp

src/shared/drivers/timer/BasicTimer.h

src/shared/drivers/timer/GeneralPurposeTimer.h

src/shared/drivers/timer/TimerUtils.h

src/shared/utils/ClockUtils.h