Feature request: Allow to execute more code in on save when using auto gui

Just like title

Currently there is no way to execute some code in on save when using auto gui using config class

public class ModConfig {
    public static ConfigClassHandler<ModConfig> HANDLER = ConfigClassHandler.createBuilder(ModConfig.class)
            .id(new ResourceLocation(GlowingOres.MOD_ID))
            .serializer(config -> GsonConfigSerializerBuilder.create(config)
                    .setPath(FabricLoader.getInstance().getConfigDir().resolve(GlowingOres.MOD_ID + ".json5"))
                    .setJson5(true)
                    .build())
            .build();

    @SerialEntry(comment = "The light for diamond ore block")
    @AutoGen(category = "")
    @IntSlider(min = 0, max = 15, step = 1)
    public int diamondOreLight = 15;
}


    YetAnotherConfigLib gui = ModConfig.HANDLER
                    .generateGui();
            return gui.generateScreen(screen);

Start by reading the ConfigClassHandler.generateGui() entry point and the auto-generated GUI flow shown in the issue. Trace where save actions are handled and determine the intended way to execute additional code after saving. Done means the config-class auto GUI supports an explicit on-save action and its behavior is covered by an appropriate test or documented usage example.