Fix transient include issue

Author: Ravbug

RavEngine

@@ -11,6 +11,7 @@
 #include <RavEngine/Ref.hpp>
 #include <RavEngine/PhysicsBodyComponent.hpp>
 #include <memory>
+#include <RmlUi/Core.h>
 
 Ref<PBRMaterialInstance> Puck::material;
 using namespace std;

Samples/AirHockey/GameWorld.cpp

@@ -5,6 +5,7 @@
 #include "GameWorld.hpp"
 #include <RavEngine/Debug.hpp>
 #include <RavEngine/CameraComponent.hpp>
+#include <RmlUi/Core.h>
 
 using namespace RavEngine;
 using namespace std;

Samples/AirHockey/MainMenu.cpp

@@ -14,6 +14,7 @@
 #include <RavEngine/Window.hpp>
 #include <RavEngine/StartApp.hpp>
 #include <RavEngine/MeshCollection.hpp>
+#include <RmlUi/Core.h>
 
 using namespace RavEngine;
 using namespace std;

Samples/Navigation/main.cpp

@@ -9,6 +9,7 @@
 #include <RavEngine/RenderEngine.hpp>
 #include "CustomMaterials.hpp"
 #include <RavEngine/MeshCollection.hpp>
+#include <RmlUi/Core.h>
 
 using namespace std;
 using namespace RavEngine;

Samples/Perf_Draw/Level.cpp

@@ -11,6 +11,7 @@
 #include <RavEngine/RenderEngine.hpp>
 #include <RavEngine/MeshCollection.hpp>
 #include <array>
+#include <RmlUi/Core.h>
 
 using namespace RavEngine;
 using namespace std;

Samples/Perf_DrawAnimated/PerfC_World.cpp

@@ -9,6 +9,7 @@
 #include <RavEngine/GameObject.hpp>
 #include <RavEngine/CameraComponent.hpp>
 #include <chrono>
+#include <RmlUi/Core.h>
 
 using namespace std;
 using namespace RavEngine;

Samples/Perf_ECS/Level.cpp

@@ -8,6 +8,7 @@
 #include <FPSSystem.hpp>
 #include <RavEngine/StaticMesh.hpp>
 #include <RavEngine/MeshCollection.hpp>
+#include <RmlUi/Core.h>
 
 using namespace RavEngine;
 using namespace std;

Samples/Perf_Lighting/Level.cpp

@@ -8,6 +8,7 @@
 #include <RavEngine/GameObject.hpp>
 #include <RavEngine/CameraComponent.hpp>
 #include "Level.hpp"
+#include <RmlUi/Core.h>
 
 using namespace RavEngine;
 using namespace std;

Samples/Perf_Network/ClientMenuLevel.cpp

@@ -4,6 +4,7 @@
 #include <RavEngine/InputManager.hpp>
 #include <RavEngine/GameObject.hpp>
 #include <RavEngine/CameraComponent.hpp>
+#include <RmlUi/Core.h>
 
 using namespace RavEngine;
 using namespace std;