HAL renaming & relocation (#215)

Implemented more consistent naming:
- Moved all HAL devices into their own namespace (and related folder)
- Post-fixed all HAL device names with "Device"

Boards/UnPhone/Source/hal/UnPhoneDisplay.cpp

@@ -63,10 +63,10 @@ bool UnPhoneDisplay::stop() {
     return true;
 }
 
-std::shared_ptr<tt::hal::Touch> _Nullable UnPhoneDisplay::createTouch() {
+std::shared_ptr<tt::hal::touch::TouchDevice> _Nullable UnPhoneDisplay::createTouch() {
     return std::make_shared<UnPhoneTouch>();
 }
 
-std::shared_ptr<tt::hal::Display> createDisplay() {
+std::shared_ptr<tt::hal::display::DisplayDevice> createDisplay() {
     return std::make_shared<UnPhoneDisplay>();
 }