Add a very primitive new sidebar tab for the module

module/Apps/StatSidebar.mjs

@@ -0,0 +1,47 @@
+import { filePath } from "../consts.mjs";
+import { StatsViewer } from "./StatsViewer.mjs";
+
+const { HandlebarsApplicationMixin } = foundry.applications.api;
+const { AbstractSidebarTab } = foundry.applications.sidebar;
+
+export class StatSidebar extends HandlebarsApplicationMixin(AbstractSidebarTab) {
+	/** @override */
+	static DEFAULT_OPTIONS = {
+		classes: [
+			__ID__,
+			`StatsSidebar`,
+		],
+		window: {
+			title: `SIDEBAR.TabSettings`,
+		},
+		actions: {
+			openStats: this.#openStats,
+		},
+	};
+
+	/** @override */
+	static tabName = `stats`;
+
+	/** @override */
+	static PARTS = {
+		stats: {
+			template: filePath(`templates/Apps/StatSidebar/main.hbs`),
+			root: true,
+		},
+	};
+
+	async _prepareContext(options) {
+		const ctx = await super._prepareContext(options);
+		const db = CONFIG.StatsDatabase;
+
+		ctx.tableCount = db.getTables().length;
+
+		return ctx;
+	};
+
+	/** @this {StatSidebar} */
+	static async #openStats() {
+		const app = new StatsViewer();
+		app.render({ force: true });
+	};
+};