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/EnttWorld.inl

@@ -0,0 +1,53 @@
+// 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
+
+#include <Nazara/Core/EnttWorld.hpp>
+#include <Nazara/Core/Debug.hpp>
+
+namespace Nz
+{
+	inline EnttWorld::EnttWorld() :
+	m_systemGraph(m_registry)
+	{
+	}
+
+	template<typename T, typename... Args>
+	T& EnttWorld::AddSystem(Args&&... args)
+	{
+		return m_systemGraph.AddSystem<T>(std::forward<Args>(args)...);
+	}
+
+	inline entt::handle EnttWorld::CreateEntity()
+	{
+		return entt::handle(m_registry, m_registry.create());
+	}
+
+	inline entt::registry& EnttWorld::GetRegistry()
+	{
+		return m_registry;
+	}
+
+	inline const entt::registry& EnttWorld::GetRegistry() const
+	{
+		return m_registry;
+	}
+
+	template<typename T>
+	T& EnttWorld::GetSystem() const
+	{
+		return m_systemGraph.GetSystem<T>();
+	}
+
+	inline EnttWorld::operator entt::registry&()
+	{
+		return m_registry;
+	}
+
+	inline EnttWorld::operator const entt::registry&() const
+	{
+		return m_registry;
+	}
+}
+
+#include <Nazara/Core/DebugOff.hpp>