Project restructuring (fixes macOS builds) (#198)

- Create `Include/` folder for all main projects
- Fix some issues here and there (found while moving things)
- All includes are now in `Tactility/` subfolder and must be included with that prefix. This fixes issues with clashing POSIX headers (e.g. `<semaphore.h>` versus Tactility's `Semaphore.h`)

Libraries/QRCode/CMakeLists.txt

@@ -8,8 +8,6 @@ if (DEFINED ENV{ESP_IDF_VERSION})
         INCLUDE_DIRS "src/"
     )
 
-    add_definitions(-DESP_PLATFORM)
-
     if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
         target_compile_options(${COMPONENT_LIB} PUBLIC -Wno-unknown-pragmas)
     endif()