Sdk/Entity: Add enable/disable mechanism

Former-commit-id: 09884bdacf2b573bef516936d2580942cc5d4f66

SDK/include/NDK/Entity.inl

@@ -19,6 +19,15 @@ namespace Ndk
 		return static_cast<ComponentType&>(AddComponent(std::move(ptr)));
 	}
 
+	inline void Entity::Enable(bool enable)
+	{
+		if (m_enabled != enable)
+		{
+			m_enabled = enable;
+			Invalidate();
+		}
+	}
+
 	inline BaseComponent& Entity::GetComponent(ComponentIndex index)
 	{
 		///DOC: Le component doit être présent
@@ -74,6 +83,11 @@ namespace Ndk
 		return HasComponent(index);
 	}
 
+	inline bool Entity::IsEnabled() const
+	{
+		return m_enabled;
+	}
+
 	inline bool Entity::IsValid() const
 	{
 		return m_valid;