rename header files from *.h to *.hpp

src/appdatapath.hpp

@@ -0,0 +1,15 @@
+#pragma once
+
+#include <QString>
+
+#include <mutex>
+
+class Path
+{
+public:
+    static const QString &getAppdataPath();
+
+private:
+    static QString appdataPath;
+    static std::mutex appdataPathMutex;
+};