fix wrong horizontal selection for north/south variants

ButterflyPins/BlockEntities/BlockEntityButterflyPinBoard.cs

@@ -120,6 +120,9 @@ public class BlockEntityButterflyPinBoard : BlockEntityDisplay
         double height = (1 - (BoardMargin * 2)) / Rows;
 
         int column = GameMath.Clamp((int)((local.X - BoardMargin) / width), 0, Columns - 1);
+        if (IsNorthSouthVariant())
+            column = (Columns - 1) - column;
+
         int rowFromBottom = GameMath.Clamp((int)((local.Y - BoardMargin) / height), 0, Rows - 1);
         int rowFromTop = Rows - 1 - rowFromBottom;
 
@@ -205,6 +208,12 @@ public class BlockEntityButterflyPinBoard : BlockEntityDisplay
         };
     }
 
+    private bool IsNorthSouthVariant()
+    {
+        string side = Block?.Variant?["side"] ?? "south";
+        return side is "north" or "south";
+    }
+
     public float GetRenderScale()
     {
         return RenderScale;