UpdateModule core plugin and integrated it into the server boot process, allowing the server to check for and apply updates, notify players, and handle staged updates.UpdateConfig in HytaleServerConfig with fields for enabling updates, check intervals, notification preferences, patchline selection, backup options, and auto-apply modes. Includes serialization support and getter/setter methods.ShutdownReason.UPDATE to indicate when the server should restart to apply a staged update./update commands and detailed server messages for checking, downloading, applying, and managing updates, including player notifications and auto-apply warnings.start.sh, start.bat).