Initial commit for GitHub migration based on spice2x-25-03-03

src/spice2x/util/time.h

@@ -0,0 +1,9 @@
+#pragma once
+
+#include <cstdint>
+
+void init_performance_counter();
+double get_performance_seconds();
+double get_performance_milliseconds();
+uint64_t get_system_seconds();
+uint64_t get_system_milliseconds();