Add datasheet for sync sheets

module/sheets/Datasheets/GroupDataSheet.mjs

@@ -0,0 +1,31 @@
+export class GroupDataSheet extends ActorSheet {
+	static get defaultOptions() {
+		let opts = foundry.utils.mergeObject(
+			super.defaultOptions,
+			{
+				template: `systems/dotdungeon/templates/datasheets/actor/group.hbs`,
+				width: 200,
+				height: 275
+			},
+		);
+		opts.classes.push(`dotdungeon`, `style-v3`);
+		return opts;
+	};
+
+	async getData() {
+		const ctx = {};
+
+		ctx.actor = this.actor;
+		ctx.system = this.actor.system;
+
+		ctx.computed = {
+			milestones_hit_viewable: [...this.actor.system.milestones_hit.values()].join(`, `)
+		}
+
+		ctx.meta = {
+			idp: this.actor.uuid,
+		};
+
+		return ctx;
+	};
+};