refactor: reorganize all components (#8303)

src/sidebar-item/index.ts

@@ -0,0 +1,7 @@
+import { installable } from '../utils';
+import _SidebarItem from './SidebarItem';
+
+const SidebarItem = installable(_SidebarItem);
+
+export default SidebarItem;
+export { SidebarItem };