split off MovementSystem and AiSystem from ShipSystem

src/balancing/ArenaSimulation.h

@@ -14,8 +14,10 @@
 #include "GameConfig.h"
 #include "Tick.h"
 
+class AiSystem;
 class BuildingSystem;
 class CombatSystem;
+class MovementSystem;
 class ShipSystem;
 class ScrapSystem;
 
@@ -81,9 +83,11 @@ private:
 
     BeltSystem m_beltSystem;
     std::unique_ptr<BuildingSystem> m_buildingSystem;
-    std::unique_ptr<ShipSystem> m_shipSystem;
-    std::unique_ptr<CombatSystem> m_combatSystem;
-    std::unique_ptr<ScrapSystem> m_scrapSystem;
+    std::unique_ptr<ShipSystem>     m_shipSystem;
+    std::unique_ptr<AiSystem>       m_aiSystem;
+    std::unique_ptr<MovementSystem> m_movementSystem;
+    std::unique_ptr<CombatSystem>   m_combatSystem;
+    std::unique_ptr<ScrapSystem>    m_scrapSystem;
 
     EntityId m_team1HqId;
     EntityId m_team2HqId;