feat: check merge limits when completing auto-merge (#3868)

- Closes #3748

Core/src/main/java/com/plotsquared/core/command/Auto.java

@@ -142,6 +142,14 @@ public class Auto extends SubCommand {
                 }
             }
         }
+        int maxMerge = Permissions.hasPermissionRange(player, Permission.PERMISSION_MERGE, Settings.Limit.MAX_PLOTS);
+        if (sizeX * sizeZ > maxMerge) {
+            player.sendMessage(
+                    TranslatableCaption.of("permission.no_permission"),
+                    Template.of("node", Permission.PERMISSION_MERGE + "." + (sizeX * sizeZ))
+            );
+            return false;
+        }
         return true;
     }
 

Core/src/main/java/com/plotsquared/core/command/Merge.java

@@ -124,7 +124,7 @@ public class Merge extends SubCommand {
             return false;
         }
         final int size = plot.getConnectedPlots().size();
-        int max = Permissions.hasPermissionRange(player, "plots.merge", Settings.Limit.MAX_PLOTS);
+        int max = Permissions.hasPermissionRange(player, Permission.PERMISSION_MERGE, Settings.Limit.MAX_PLOTS);
         PlotMergeEvent event =
                 this.eventDispatcher.callMerge(plot, direction, max, player);
         if (event.getEventResult() == Result.DENY) {