Update NavItem model for toolbar

npm/ng-packs/packages/theme-shared/src/lib/models/nav-item.ts

@@ -1,8 +1,17 @@
 import { Injector, Type } from '@angular/core';
 import { Observable, of } from 'rxjs';
 
+export interface Badge {
+  count?: number | Observable<number>;
+  color?: string;
+  icon?: string;
+}
+
 export class NavItem {
   id?: string | number;
+  name?: string;
+  description?: string;
+  badge?: Badge;
   component?: Type<any>;
   html?: string;
   action?: () => void;