Add Discord RPC (#161)

* Add discord-rpc submodule

* Add Discord RPC

* Fix up Discord status

* Fix CMake because MacOS sucks

* Slightly less hacky fix

include/config.hpp

@@ -6,6 +6,7 @@
 // Remember to initialize every field here to its default value otherwise bad things will happen
 struct EmulatorConfig {
 	bool shaderJitEnabled = false;
+	bool discordRpcEnabled = false;
 	RendererType rendererType = RendererType::OpenGL;
 
 	EmulatorConfig(const std::filesystem::path& path);