fully implement KeepAlive behavior

include/server/systems/DisconnectSystem.h

@@ -0,0 +1,23 @@
+#pragma once
+
+#include <Nazara/Core/Time.hpp>
+#include <entt/entity/registry.hpp>
+
+namespace blitz {
+namespace server {
+
+class Server;
+
+class DisconectSystem {
+  public:
+	DisconectSystem(entt::registry& a_Registry, Server& a_Server);
+
+	void Update(Nz::Time elapsedTime);
+
+  private:
+	entt::registry& m_Registry;
+	Server& m_Server;
+};
+
+}  // namespace server
+}  // namespace blitz