Time for action – finding the path

1. Add the FindPath() method to the PathFinder class:

   #region Public Methods
   static public List<Vector2> FindPath(
       Vector2 startTile, 
       Vector2 endTile)
   {
       if (TileMap.IsWallTile(endTile) ||
           TileMap.IsWallTile(startTile))
       {
           return null;
       }
   
       openList.Clear();
       nodeCosts.Clear();
       nodeStatus.Clear();
   
       PathNode startNode;
       PathNode endNode;
   
       endNode = new PathNode(null, null, endTile, 0);
       startNode = new PathNode(null, endNode, startTile, 0);
   
       addNodeToOpenList(startNode);
   
       while (openList.Count > 0)
       {
           PathNode currentNode = openList[openList.Count - 1];
   
           if (currentNode.IsEqualToNode(endNode))
           {
               List<Vector2> bestPath = new List<Vector2>();
               while (currentNode != null)
               {
                   bestPath.Insert(0, currentNode.GridLocation);
                   currentNode = currentNode.ParentNode;
               }
               return...