dont require output belts to be aligned with output ports

src/lib/sim/BeltSystem.h

@@ -56,9 +56,9 @@ public:
     // port.tile      = the belt tile adjacent to the building
     // port.direction = direction items flow on that tile
     //
-    // tryPutItem: place item onto port.tile entering from the opposite side.
-    //   Returns false if the tile is not a belt, direction mismatches, or tile full.
-    bool tryPutItem(Port port, Item item);
+    // tryPutItem: place item onto tile.
+    //   Returns false if the tile is not a belt, or tile full.
+    bool tryPutItem(QPoint tile, Item item);
 
     // tryTakeItem: remove and return the leading item from port.tile.
     //   Returns nullopt if tile is not a belt, direction mismatches, or tile empty.
@@ -119,3 +119,4 @@ private:
     std::map<std::pair<int, int>, BeltTile>     m_belts;
     std::map<std::pair<int, int>, SplitterTile> m_splitters;
 };
+