Implements GJK collision detection

Adds GJK algorithm implementation for detecting collisions between mesh colliders.

Includes mesh collider definition and unit tests for basic collision detection.

Provides a foundation for more complex collision handling and physics interactions.

tests/general/unit_test_colider.cpp

@@ -0,0 +1,29 @@
+//
+// Created by Vlad on 11/9/2025.
+//
+#include <gtest/gtest.h>
+#include <omath/collision/mesh_collider.hpp>
+
+
+
+TEST(UnitTestColider, CheckToWorld)
+{
+    const std::vector<omath::Vector3<float>> mesh = {{1.f, 1.f, 1.f}, {-1.f, -1.f, -1.f}};
+
+    const omath::collision::MeshCollider collider(mesh, {0.f, 2.f, 0.f});
+
+    const auto vertex = collider.find_abs_furthest_vertex({1.f, 0.f, 0.f});
+
+    EXPECT_EQ(vertex, omath::Vector3<float>(1.f, 3.f, 1.f));
+}
+
+TEST(UnitTestColider, FindFurthestVertex)
+{
+    const std::vector<omath::Vector3<float>> mesh = {{1.f, 1.f, 1.f}, {-1.f, -1.f, -1.f}};
+    const omath::collision::MeshCollider collider(mesh, {0.f, 0.f, 0.f});
+    const auto vertex = collider.find_furthest_vertex({1.f, 0.f, 0.f});
+    EXPECT_EQ(vertex, omath::Vector3<float>(1.f, 1.f, 1.f));
+}
+
+
+

tests/general/unit_test_gjk.cpp

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+//
+// Created by Vlad on 11/9/2025.
+//
+#include <gtest/gtest.h>
+#include <omath/collision/gjk_algorithm.hpp>
+
+TEST(UnitTestGjk, TestCollision)
+{
+    const std::vector<omath::Vector3<float>> mesh = {
+        {-1.f, -1.f, -1.f},
+        {-1.f, -1.f,  1.f},
+        {-1.f,  1.f, -1.f},
+        {-1.f,  1.f,  1.f},
+        { 1.f,  1.f,  1.f}, // x = +1 vertices (put {1,1,1} first in case your support breaks ties by first-hit)
+        { 1.f,  1.f, -1.f},
+        { 1.f, -1.f,  1.f},
+        { 1.f, -1.f, -1.f}
+    };
+
+    const omath::collision::MeshCollider collider_a(mesh, {0.f, 0.f, 0.f});
+    const omath::collision::MeshCollider collider_b(mesh, {0.f, 3.f, 0.f});
+
+    const auto result = omath::collision::GjkAlgorithm::check_collision(collider_a, collider_b);
+}