Register some settings for the system, including some developer-only settings

module/settings/client_settings.mjs

@@ -0,0 +1,11 @@
+export default function() {
+	game.settings.register(`dotdungeon`, `showAvatarOnSheet`, {
+		name: `dotdungeon.settings.showAvatarOnSheet.name`,
+		hint: `dotdungeon.settings.showAvatarOnSheet.description`,
+		scope: `client`,
+		type: Boolean,
+		config: true,
+		default: true,
+		requiresReload: false,
+	});
+};