chg: use rich address partial in checkout with add/delete support

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.

resources/views/Shop/Customers/partials/address_item.blade.php

@@ -1,7 +1,7 @@
 <div class="row mt-3 address-row" data-address-id="{{ $address['id'] }}">
     <div class="col-1">
         @php
-            $inputName = isset($prefix) && $prefix ? $prefix.'[address_id]' : 'address_id';
+            $inputName = $inputName ?? (isset($prefix) && $prefix ? $prefix.'[address_id]' : 'address_id');
             $currentValue = $selected ?? null;
         @endphp
         <x-form.radios.icheck name="{{ $inputName }}" val="{{ $address['id'] }}"