Starting to move data loader to its own package

Signed-off-by: Hans Kokx <hans.d.kokx@gmail.com>

lib/features/map/wolf_map_parser.dart

@@ -1,7 +1,7 @@
 import 'dart:convert';
 import 'dart:typed_data';
 
-import 'package:wolf_dart/classes/matrix.dart';
+import 'package:wolf_3d_data/wolf_3d_data.dart';
 import 'package:wolf_dart/features/entities/map_objects.dart';
 import 'package:wolf_dart/features/map/wolf_level.dart';
 
@@ -86,8 +86,8 @@ abstract class WolfMapParser {
         }
       }
 
-      Matrix<int> wallGrid = [];
-      Matrix<int> objectGrid = []; // NEW
+      Sprite wallGrid = [];
+      Sprite objectGrid = []; // NEW
 
       for (int y = 0; y < height; y++) {
         List<int> wallRow = [];