fix: demolish did not return blocks

src/lib/sim/Simulation.cpp

@@ -447,6 +447,11 @@ EntityId Simulation::tryPlaceBuilding(BuildingType type, QPoint anchor, Rotation
     return m_buildingSystem->place(type, anchor, rotation, m_currentTick);
 }
 
+void Simulation::demolish(EntityId id)
+{
+    m_buildingBlocksStock += m_buildingSystem->demolish(id);
+}
+
 BuildingSystem& Simulation::buildings()
 {
     return *m_buildingSystem;