Automatically switch to dedicated GPU in OpenGOAL runtime (#1715)

* Automatically switch to dedicated GPU for runtime

Some machines with dual-GPUs cannot properly detect OpenGOAL as a high-performance application and properly utilize the dedicated GPU. This sets a flag for both Radeon and NVIDIA GPUs to always use the high performance GPU when available. I do not have a dual-GPU machine to test this on, but this should just work out of the box.

* clang-format

One day I will understand clang

game/main.cpp

@@ -17,6 +17,13 @@
 
 #include "game/discord.h"
 
+#ifdef _WIN32
+extern "C" {
+__declspec(dllexport) unsigned long NvOptimusEnablement = 0x00000001;
+__declspec(dllexport) int AmdPowerXpressRequestHighPerformance = 1;
+}
+#endif
+
 // Discord RPC
 extern int64_t gStartTime;