Adds plane primitive generation

Implements a function to generate a plane primitive from two vertices, a direction vector, and a size, returning an array of two triangles.

include/omath/3d_primitives/plane.hpp

@@ -0,0 +1,16 @@
+//
+// Created by Vlad on 8/28/2025.
+//
+
+#pragma once
+#include "omath/triangle.hpp"
+#include "omath/vector3.hpp"
+#include <array>
+
+namespace omath::primitives
+{
+    [[nodiscard]]
+    std::array<Triangle<Vector3<float>>, 2> create_plane(const Vector3<float>& vertex_a,
+                                                          const Vector3<float>& vertex_b,
+                                                          const Vector3<float>& direction, float size) noexcept;
+}