Add system power use tracking skeleton.

public/client/TracySysPower.hpp

@@ -0,0 +1,25 @@
+#ifndef __TRACYSYSPOWER_HPP__
+#define __TRACYSYSPOWER_HPP__
+
+#if defined __linux__
+#  define TRACY_HAS_SYSPOWER
+#endif
+
+#ifdef TRACY_HAS_SYSPOWER
+
+namespace tracy
+{
+
+class SysPower
+{
+public:
+    SysPower();
+    ~SysPower();
+
+    void Tick();
+};
+
+}
+#endif
+
+#endif