move FactoryState ownership out of BuildingSystem to Simulation

src/test/BehaviorSystemTest.cpp

@@ -14,6 +14,7 @@
 #include "BeltSystem.h"
 #include "Building.h"
 #include "BuildingSystem.h"
+#include "FactoryState.h"
 #include "BuildingType.h"
 #include "ConfigLoader.h"
 #include "DeliverScrapBehavior.h"
@@ -54,6 +55,7 @@
 struct Fixture
 {
     GameConfig     cfg;
+    FactoryState   state;
     BeltSystem     belts;
     BuildingId       nextBuildingId;
     int            stock;
@@ -76,7 +78,7 @@ struct Fixture
         , nextBuildingId(1)
         , stock(0)
         , rng(42)
-        , buildings(cfg, belts,
+        , buildings(cfg, state, belts,
                     [this]() { return nextBuildingId++; },
                     [this](int n) { stock += n; },
                     [](const std::string&, QVector2D, const std::optional<ShipLayoutConfig>&) {},