Buildings as entities instead of map layer

game/pathfinding.h

@@ -9,7 +9,7 @@ typedef struct PathNode {
     i32 weight; // fCost = g + h
     i32 gCost; // from start cost
     i32 hCost; // to target cost
-    TilePosition pos;
+    Vec2i pos;
 } PathNode;
 
 typedef struct PathNodeRecord {