function add(
	icon,
	id,
	title,
	initFunction,
	prepend = false,
	onSelected = () => {},
) {
	currentSection ??= id;

	const active = currentSection === id;
	const app = new SidebarApp(icon, id, title, initFunction, onSelected);

	app.active = active;
	app.install(prepend);
	apps.push(app);
}
@param {string} icon icon of the app
@param {string} id id of the app
@param {HTMLElement} el element to show in sidebar
@param {string} title title of the app
@param {(container:HTMLElement)=>void} initFunction
@param {boolean} prepend weather to show this app at the top of the sidebar or not
@param {(container:HTMLElement)=>void} onSelected
@returns {void}