.h -> .hpp for clearer ABI (non)compatibility

include/ShellService.hpp

@@ -0,0 +1,12 @@
+#ifndef SHELL_SERVICE_H
+#define SHELL_SERVICE_H
+
+#include <string>
+
+class ShellService {
+    public:
+        static std::string exec(const std::string& command);
+        static std::string getHomePath();
+};
+
+#endif