Add a visual line separator above the new section

Add an a-divider component to visually separate the new section demonstrating the separator generator function.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: 6cc5c7da-6689-4391-8349-0b45bd1c8827
Replit-Commit-Checkpoint-Type: full_checkpoint
Replit-Commit-Event-Id: f161640c-7968-4322-a8a3-c3c25370a2f4
Replit-Helium-Checkpoint-Created: true

Author: janrozic1

attached_assets/targeted_element_1765522910746.png

@@ -28,6 +28,8 @@ You can also pass a generator function that receives the previous item and index
     <a-breadcrumb-item>An Application</a-breadcrumb-item>
   </a-breadcrumb>
 
+  <a-divider />
+
   <p style="margin: 16px 0">Using a separator generator function:</p>
 
   <a-breadcrumb :separator="separatorGenerator">