new: show payment-specific confirmation for check/wire orders

Display a tailored confirmation message when the customer pays by
check or wire transfer, including a warning about the 30-day
cancellation policy. The payment type is passed as a query parameter
so the message survives page reloads.

- Add ``getOrderConfirmedByCheckContent()`` and
  ``getOrderConfirmedByWireContent()`` to ``Contents`` repository
- Flash ``payment_type`` through redirect query parameter
- Add migration inserting content rows (id 10, 11)
- Update confirmed view with green checkmark and warning icon

resources/views/Shop/Orders/confirmed.blade.php

@@ -4,8 +4,20 @@
 
 @section('content')
     <div class="row">
-        <div class="col-12">
-            {!! $content !!}
+        <div class="col-12 text-center py-5">
+            <i class="fa fa-check-circle text-success" style="font-size: 5rem;"></i>
+            <div class="mt-4" style="font-size: 1.2rem;">
+                {!! $content !!}
+            </div>
+            @if($payment_label ?? false)
+                <div class="mt-3" style="font-size: 1.1rem;">
+                    Votre commande a bien été enregistrée, elle vous sera expédiée dès réception de votre {{ $payment_label }}.
+                </div>
+                <div class="mt-3" style="font-size: 1.1rem;">
+                    <i class="fa fa-exclamation-triangle text-warning mr-1"></i>
+                    Sans réception de votre paiement au bout de 30 jours, votre commande sera annulée.
+                </div>
+            @endif
         </div>
     </div>
 @endsection