Use fucking graphs again

lib/mod.dart

@@ -47,6 +47,17 @@ class Mod {
     this.enabled = false,
   });
 
+  int get tier {
+    if (isBaseGame) return 0;
+    if (isExpansion) return 1;
+    return 2;
+  }
+
+  @override
+  String toString() {
+    return 'Mod{name: $name, id: $id, path: $path, dependencies: $dependencies, loadAfter: $loadAfter, loadBefore: $loadBefore, incompatibilities: $incompatibilities, size: $size, isBaseGame: $isBaseGame, isExpansion: $isExpansion}';
+  }
+
   static Mod fromDirectory(String path, {bool skipFileCount = false}) {
     final logger = Logger.instance;
     final stopwatch = Stopwatch()..start();