fix: windows build, uncap fps, double buffer, remove Sleep(0),

Minecraft.Client/Windows64/Windows64_Minecraft.cpp

@@ -498,7 +498,7 @@ app.DebugPrintf("width: %d, height: %d\n", width, height);
 
 	DXGI_SWAP_CHAIN_DESC sd;
 	ZeroMemory( &sd, sizeof( sd ) );
-	sd.BufferCount = 1;
+	sd.BufferCount = 2;
 	sd.BufferDesc.Width = width;
 	sd.BufferDesc.Height = height;
 	sd.BufferDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;