set world level command

src/main/java/emu/grasscutter/commands/PlayerCommands.java

@@ -15,6 +15,7 @@ import emu.grasscutter.game.inventory.Inventory;
 import emu.grasscutter.game.inventory.ItemType;
 import emu.grasscutter.game.props.ActionReason;
 import emu.grasscutter.game.props.FightProperty;
+import emu.grasscutter.game.props.PlayerProperty;
 import emu.grasscutter.server.packet.send.PacketEntityFightPropUpdateNotify;
 import emu.grasscutter.server.packet.send.PacketItemAddHintNotify;
 import emu.grasscutter.utils.Position;
@@ -303,6 +304,29 @@ public final class PlayerCommands {
         }
     }
 
+    @Command(label = "setworldlevel", aliases = {"setworldlvl"}, 
+            usage = "Usage: setworldlevel <level>", execution = Command.Execution.PLAYER)
+    public static class SetWorldLevelCommand implements CommandHandler {
+        @Override
+        public void execute(GenshinPlayer player, List<String> args) {
+            if(args.size() < 1) {
+                CommandHandler.sendMessage(null, "Usage: setworldlevel <level>"); return;
+            }
+            
+            try {
+                int level = Integer.parseInt(args.get(0));
+
+                // Set in both world and player props
+                player.getWorld().setWorldLevel(level);
+                player.setProperty(PlayerProperty.PROP_PLAYER_WORLD_LEVEL, level);
+
+                player.dropMessage("World level set to " + level + ".");
+            } catch (NumberFormatException ignored) {
+                CommandHandler.sendMessage(null, "Invalid world level.");
+            }
+        }
+    }
+    
     @Command(label = "clearartifacts", aliases = {"clearart"}, 
             usage = "Usage: clearartifacts", execution = Command.Execution.PLAYER)
     public static class ClearArtifactsCommand implements CommandHandler {