Refactor services into classes (#183)

TactilityHeadless/Source/service/Service.h

@@ -0,0 +1,24 @@
+#pragma once
+
+#include <memory>
+
+namespace tt::service {
+
+// Forward declaration
+class ServiceContext;
+
+class Service {
+
+public:
+
+    Service() = default;
+    virtual ~Service() = default;
+
+    virtual void onStart(ServiceContext& serviceContext) {}
+    virtual void onStop(ServiceContext& serviceContext) {}
+};
+
+template<typename T>
+std::shared_ptr<Service> create() { return std::shared_ptr<T>(new T); }
+
+}