add library as git submodule, wayland, window shows

lib/RGFW_HS.h

@@ -0,0 +1,16 @@
+#ifndef RGFW_HS // avoid repeated imports
+#define RGFW_HS
+
+// TODO add actual include logic
+
+#define RGFW_IMPLEMENTATION
+#define RGFW_DEBUG
+#define RGFW_X11
+#define RGFW_WAYLAND
+#define RGFW_OPENGL
+
+#define Time X11Time // fixes namespace clash with GHC when building with Nix
+#include "RGFW/RGFW.h"
+#undef Time
+
+#endif RGFW_HS