Add foundation of the application and templates

module/apps/SidebarTabRearranger.mjs

@@ -0,0 +1,72 @@
+import { __ID__, filePath } from "../consts.mjs";
+
+const { HandlebarsApplicationMixin, ApplicationV2 } = foundry.applications.api;
+const { getDocumentClass } = foundry.utils;
+
+export class SidebarTabRearranger extends HandlebarsApplicationMixin(ApplicationV2) {
+	// #region Options
+	static DEFAULT_OPTIONS = {
+		tag: `form`,
+		classes: [
+			__ID__,
+			`SidebarTabRearranger`,
+		],
+		window: {
+			title: `OFT.apps.SidebarTabRearranger.title`,
+		},
+		position: {},
+		form: {
+			handler: this.#onSubmit,
+			closeOnSubmit: true,
+			submitOnChange: false,
+		},
+		actions: {},
+	};
+
+	static PARTS = {
+		list: { template: filePath(`templates/SidebarTabRearranger/list.hbs`) },
+		footer: { template: filePath(`templates/SidebarTabRearranger/footer.hbs`) },
+	};
+	// #endregion Options
+
+	// #region Instance Data
+	// #endregion Instance Data
+
+	// #region Lifecycle
+	/** @this {SidebarTabRearranger} */
+	static async #onSubmit() {};
+	// #endregion Lifecycle
+
+	// #region Data Prep
+	async _prepareContext() {
+		const ctx = {
+			meta: {
+				idp: this.id,
+			},
+		};
+
+		const tabs = ui.sidebar.constructor.TABS;
+		ctx.tabs = [];
+		for (const [id, tab] of Object.entries(tabs)) {
+			let { documentName, gmOnly, tooltip, icon } = tab;
+			if (gmOnly && !game.user.isGM) { continue };
+
+			if (documentName) {
+				tooltip ??= getDocumentClass(documentName).metadata.labelPlural;
+				icon ??= CONFIG[documentName]?.sidebarIcon;
+			};
+
+			ctx.tabs.push({
+				id,
+				name: game.i18n.localize(tooltip),
+				icon,
+			});
+		};
+
+		return ctx;
+	};
+	// #endregion Data Prep
+
+	// #region Actions
+	// #endregion Actions
+};