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.

tests/general/unit_test_line_trace.cpp

@@ -2,10 +2,10 @@
 // Revised unit‑test suite for LineTracer (segment‑based Möller–Trumbore)
 // Pure ASCII: avoids non‑standard characters that MSVC rejects.
 //
-#include "gtest/gtest.h"
+#include "omath/linear_algebra/vector3.hpp"
 #include "omath/collision/line_tracer.hpp"
 #include "omath/triangle.hpp"
-#include "omath/vector3.hpp"
+#include "gtest/gtest.h"
 #include <cmath>
 
 using namespace omath;

tests/general/unit_test_mat.cpp

@@ -1,7 +1,7 @@
 // UnitTestMat.cpp
+#include "omath/linear_algebra/mat.hpp"
+#include "omath/linear_algebra/vector3.hpp"
 #include <gtest/gtest.h>
-#include "omath/mat.hpp"
-#include "omath/vector3.hpp"
 
 using namespace omath;
 

tests/general/unit_test_triangle.cpp

@@ -1,11 +1,10 @@
 //
 // Created by Orange on 1/6/2025.
 //
+#include "omath/triangle.hpp"
+#include "omath/linear_algebra/vector3.hpp"
 #include <cmath> // For std::sqrt, std::isinf, std::isnan
 #include <gtest/gtest.h>
-#include <omath/vector3.hpp>
-#include "omath/triangle.hpp"
-
 
 using namespace omath;
 

tests/general/unit_test_vector2.cpp

@@ -2,10 +2,10 @@
 // Created by Vlad on 02.09.2024.
 //
 
+#include <omath/linear_algebra/vector2.hpp>
 #include <cfloat> // For FLT_MAX and FLT_MIN
 #include <cmath> // For std::isinf and std::isnan
 #include <gtest/gtest.h>
-#include <omath/vector2.hpp>
 
 using namespace omath;
 

tests/general/unit_test_vector3.cpp

@@ -2,11 +2,11 @@
 // Created by Vlad on 01.09.2024.
 //
 
+#include <omath/linear_algebra/vector3.hpp>
 #include <cfloat> // For FLT_MAX, FLT_MIN
 #include <cmath>
 #include <gtest/gtest.h>
 #include <limits> // For std::numeric_limits
-#include <omath/vector3.hpp>
 
 using namespace omath;
 

tests/general/unit_test_vector4.cpp

@@ -5,9 +5,9 @@
 // Vector4Test.cpp
 //
 
+#include <omath/linear_algebra/vector4.hpp>
 #include <gtest/gtest.h>
 #include <limits> // For std::numeric_limits
-#include <omath/vector4.hpp>
 
 using namespace omath;