Rework EnTT integration

- Update EnTT to 3.11.1
- Moved EnTT wrapper to EnTTWorld, inheriting EntityWorld
- AppEntitySystemComponent can now handles multiple EntityWorld
- Headers relying on EnTT are now automatically included if NAZARA_ENTT is defined
- Renamed SystemGraph to EnttSystemGraph (as it depends on it for now)

include/Nazara/Core/EntityWorld.hpp

@@ -0,0 +1,33 @@
+// Copyright (C) 2023 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
+// This file is part of the "Nazara Engine - Core module"
+// For conditions of distribution and use, see copyright notice in Config.hpp
+
+#pragma once
+
+#ifndef NAZARA_CORE_ENTITYWORLD_HPP
+#define NAZARA_CORE_ENTITYWORLD_HPP
+
+#include <Nazara/Prerequisites.hpp>
+#include <Nazara/Core/Config.hpp>
+#include <Nazara/Core/Time.hpp>
+
+namespace Nz
+{
+	class NAZARA_CORE_API EntityWorld
+	{
+		public:
+			EntityWorld() = default;
+			EntityWorld(const EntityWorld&) = default;
+			EntityWorld(EntityWorld&&) = default;
+			virtual ~EntityWorld();
+
+			virtual void Update(Time elapsedTime) = 0;
+
+			EntityWorld& operator=(const EntityWorld&) = default;
+			EntityWorld& operator=(EntityWorld&&) = default;
+	};
+}
+
+#include <Nazara/Core/EntityWorld.inl>
+
+#endif // NAZARA_CORE_ENTITYWORLD_HPP