fix(structure): group components into groups inside the repo

ts_web/elements/interfaces/index.ts

@@ -1,3 +1,4 @@
 export * from './tab.js';
 export * from './selectionoption.js';
 export * from './appbarmenuitem.js';
+export * from './menugroup.js';

ts_web/elements/interfaces/menugroup.ts

@@ -0,0 +1,6 @@
+import type { ITab } from './tab.js';
+
+export interface IMenuGroup {
+  name?: string;
+  tabs: ITab[];
+}