🚨 Add prominent red warning banner to publish command

binder

@@ -969,6 +969,11 @@ class BookBinder:
     def publish(self):
         """Publish the book (build + deploy) - Step by step process"""
         
+        console.print("\n" + "="*60)
+        console.print("[bold red]🚀 PUBLISHING WORKFLOW[/bold red]")
+        console.print("[red]This will publish the book to production![/red]")
+        console.print("="*60 + "\n")
+        
         console.print("[bold blue]🚀 MLSysBook Publishing Wizard[/bold blue]")
         console.print("[dim]I'll guide you through publishing step by step[/dim]\n")