core: Move to hyprutils for Math

Moves CRegion, CBox and Vector2D over to hyprutils.

Requires hyprutils>=0.1.4

src/helpers/math/Math.hpp

@@ -0,0 +1,11 @@
+#pragma once
+
+#include <wayland-server-protocol.h>
+
+// includes box and vector as well
+#include <hyprutils/math/Region.hpp>
+
+using namespace Hyprutils::Math;
+
+eTransform wlTransformToHyprutils(wl_output_transform t);
+void       projectBox(float mat[9], CBox& box, eTransform transform, float rotation, const float projection[9]);