IO format fixes and implemented res payment

This is a small commit to include the feature for paying for a
reservation, specifically only the 60-day-in-advance reservation type as
the others are paid for at specific periods. Other fixes include just
some formatting for reports.

OpheliasOasis/Reporting/Operational.cs

@@ -24,7 +24,7 @@ namespace Ophelias.Reporting
                 entries.Add($"{r.Guest.LastName}, {r.Guest.FirstName}\t{r.Type}\t{roominfo}\t{r.EndDate}");
             }
             string report = $"DAILY ARRIVAL REPORT - GENERATED ON {DateTime.Now.Date.ToString("yyyy-MM-dd")}\n" +
-                $"Last, First\tType\tRoom\tDeparture" +
+                $"Last, First\tType\tRoom\tDeparture\n" +
                 $"{string.Join("\n", entries)}\n\n";
 
             File.AppendAllText(Path.GetFullPath("DailyArrivals.txt"), report);