Move the delivery mode and delivery address sections before the
billing address in ``registered.blade.php``. The new order is:
Mode de livraison → Adresse de livraison → Adresse de facturation →
Paiement, which better matches the natural checkout flow.
Replaces the simple address radio list in the checkout page with the
richer ``Shop.Customers.partials.addresses`` partial already used on
the profile edit page. Customers can now choose among existing
addresses, add a new one on-the-fly, or delete an address directly
from the checkout flow.
