Refactors: Moves linear algebra to new directory

Moves linear algebra headers to a new subdirectory to improve project structure.

Updates includes to reflect the directory change.
Adds vcpkg to the tracked repositories.

include/omath/3d_primitives/box.hpp

@@ -3,10 +3,9 @@
 //
 
 #pragma once
-#include <array>
+#include "omath/linear_algebra/vector3.hpp"
 #include "omath/triangle.hpp"
-#include "omath/vector3.hpp"
-
+#include <array>
 
 namespace omath::primitives
 {

include/omath/3d_primitives/plane.hpp

@@ -3,8 +3,8 @@
 //
 
 #pragma once
+#include "omath/linear_algebra/vector3.hpp"
 #include "omath/triangle.hpp"
-#include "omath/vector3.hpp"
 #include <array>
 
 namespace omath::primitives