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`)

TactilityHeadless/Private/Tactility/service/ServiceInstancePaths.h

@@ -0,0 +1,28 @@
+#pragma once
+
+#include "Tactility/service/ServiceInstance.h"
+
+namespace tt::service {
+
+class ServiceInstancePaths final : public Paths {
+
+private:
+
+    std::shared_ptr<const ServiceManifest> manifest;
+
+public:
+
+    explicit ServiceInstancePaths(std::shared_ptr<const ServiceManifest> manifest) : manifest(std::move(manifest)) {}
+    ~ServiceInstancePaths() final = default;
+
+    std::string getDataDirectory() const final;
+    std::string getDataDirectoryLvgl() const final;
+    std::string getDataPath(const std::string& childPath) const final;
+    std::string getDataPathLvgl(const std::string& childPath) const final;
+    std::string getSystemDirectory() const final;
+    std::string getSystemDirectoryLvgl() const final;
+    std::string getSystemPath(const std::string& childPath) const final;
+    std::string getSystemPathLvgl(const std::string& childPath) const final;
+};
+
+}