Created Drivers folder with ILI934x subproject (#209)

Refactored all existing boards to re-use the ILI934x driver code.

Boards/Simulator/Source/hal/SdlDisplay.h

@@ -4,9 +4,11 @@
 #include <Tactility/hal/Display.h>
 #include <memory>
 
+/** Hack: variable comes from LvglTask.cpp */
 extern lv_disp_t* displayHandle;
 
 class SdlDisplay final : public tt::hal::Display {
+
 public:
 
     std::string getName() const final { return "SDL Display"; }