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`)

TactilityCore/Source/file/File.cpp

@@ -1,4 +1,4 @@
-#include "File.h"
+#include "Tactility/file/File.h"
 
 namespace tt::file {
 

TactilityCore/Source/file/File.h

@@ -1,23 +0,0 @@
-#pragma once
-
-#include "TactilityCore.h"
-#include <cstdio>
-
-namespace tt::file {
-
-long getSize(FILE* file);
-
-/** Read a file and return its data.
- * @param[in] filepath the path of the file
- * @param[out] size the amount of bytes that were read
- * @return null on error, or an array of bytes in case of success
- */
-std::unique_ptr<uint8_t[]> readBinary(const std::string& filepath, size_t& outSize);
-
-/** Read a file and return a null-terminated string that represents its content.
- * @param[in] filepath the path of the file
- * @return null on error, or an array of bytes in case of success. Empty string returns as a single 0 character.
- */
-std::unique_ptr<uint8_t[]> readString(const std::string& filepath);
-
-}