Add order deletion functionality

- Add delete button to AdminOrders dialog with Trash2 and AlertTriangle icons
- Create delete-order edge function to handle deletion requests
- Add database migration for delete_order function with comprehensive cleanup
- Update config.toml to register delete-order edge function
- Deletion sequence: reviews → consulting slots → order items → user access → order

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

supabase/config.toml

@@ -41,3 +41,6 @@ verify_jwt = false
 
 [functions.send-email-v2]
 verify_jwt = false
+
+[functions.delete-order]
+verify_jwt = false