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/Models/Guest.cs

@@ -67,6 +67,12 @@ namespace Ophelias.Models
             {
                 using SQLiteCommand cmd = Manager.con.CreateCommand();
                 cmd.CommandText = QueryBuilder.UpdateGuest(Id, FirstName, LastName, Email, CreditCard, Expiration, CCV);
+                cmd.Parameters.AddWithValue("@Fname", FirstName);
+                cmd.Parameters.AddWithValue("@Lname", LastName);
+                cmd.Parameters.AddWithValue("@Email", Email);
+                cmd.Parameters.AddWithValue("@CreditCard", CreditCard);
+                cmd.Parameters.AddWithValue("@Expiry", Expiration);
+                cmd.Parameters.AddWithValue("@CCV", CCV);
                 cmd.ExecuteNonQuery();
             }
             if (FirstName != null)