New game from the panel instead of an uploaded save (2.9.3)

World & Backups -> Start new game (console: new-game, also when stopped):
the save is backed up and replaced by a new-game marker (also as reset
point). Joining players are told to start a new game; the server pulls the
first player's save and from then on runs normally. Reset world returns to
a new game when the reset point is one.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

AdminPanel.cs

@@ -739,6 +739,7 @@ public sealed class AdminPanel
                 GameServer.Log($"Save game backed up by {by}");
                 return "Backup created";
             case "reset": return SaveStore.ResetOffline(dataDir, by);
+            case "newgame": return SaveStore.NewGameOffline(dataDir, by);
             case "restore": return SaveStore.RestoreOffline(dataDir, name, by);
             case "resetpoint": return SaveStore.SetResetPoint(dataDir) ?? "The current save game is now the reset point";
             case "reloadsave": return "The server is stopped - it loads the save game when you start it";