upgrade to libremidi 5.1, raylib and raygui latest

include/libremidi/backends/winmidi/config.hpp

@@ -1,19 +1,34 @@
 #pragma once
 #include <libremidi/config.hpp>
 
+#include <string>
+
+namespace winrt::Microsoft::Windows::Devices::Midi2
+{
+class MidiSession;
+class MidiEndpointDeviceInformation;
+class MidiEndpointConnection;
+}
+
+// TODO allow to share midi session and endpoints
 namespace libremidi::winmidi
 {
 
 struct input_configuration
 {
+  std::string client_name = "libremidi input";
+  winrt::Microsoft::Windows::Devices::Midi2::MidiSession* context{};
 };
 
 struct output_configuration
 {
+  std::string client_name = "libremidi output";
+  winrt::Microsoft::Windows::Devices::Midi2::MidiSession* context{};
 };
 
 struct observer_configuration
 {
+  std::string client_name = "libremidi observer";
 };
 
 }