feat(scrollBreadcrumbStore): add id field and comments

src/entities/Breadcrumb/model/store/scrollBreadcrumbsStore.svelte.ts

@@ -1,7 +1,17 @@
 import type { Snippet } from 'svelte';
 
 export interface BreadcrumbItem {
+    /**
+     * Index of the item to display
+     */
     index: number;
+    /**
+     * ID of the item to navigate to
+     */
+    id?: string;
+    /**
+     * Title snippet to render
+     */
     title: Snippet<[{ className?: string }]>;
 }