Dtos: Rename CreditNote and DeliveryConfirmation DTOs

Elwig/Windows/PaymentVariantsWindow.xaml.cs

@@ -488,7 +488,7 @@ namespace Elwig.Windows {
             members = members.OrderBy(m => m.MgNr);
 
             IEnumerable<Member> list = await members.ToListAsync();
-            var data = await CreditNoteData.ForPaymentVariant(Context.CreditNoteRows, Context.Seasons, v.Year, v.AvNr);
+            var data = await CreditNoteDeliveryData.ForPaymentVariant(Context.CreditNoteRows, Context.Seasons, v.Year, v.AvNr);
             var payments = await Context.MemberPayments.Where(p => p.Year == v.Year && p.AvNr == v.AvNr).ToDictionaryAsync(c => c.MgNr);
             await Context.GetMemberAreaCommitmentBuckets(Year, 0);
             using var doc = Document.Merge(list.Select(m =>