fix(core): Converts vendor sell packets (#375)

- [X] Converts vendor sell packets

Bumps release version

Projects/Server/Network/Packets/OutgoingVendorSellPackets.cs

@@ -0,0 +1,74 @@
+/*************************************************************************
+ * ModernUO                                                              *
+ * Copyright (C) 2019-2020 - ModernUO Development Team                   *
+ * Email: hi@modernuo.com                                                *
+ * File: OutgoingVendorSellPackets.cs                                    *
+ *                                                                       *
+ * This program is free software: you can redistribute it and/or modify  *
+ * it under the terms of the GNU General Public License as published by  *
+ * the Free Software Foundation, either version 3 of the License, or     *
+ * (at your option) any later version.                                   *
+ *                                                                       *
+ * You should have received a copy of the GNU General Public License     *
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>. *
+ *************************************************************************/
+
+using System.Buffers;
+using System.Collections.Generic;
+using System.IO;
+
+namespace Server.Network
+{
+    public static class OutgoingVendorSellPackets
+    {
+        public static void SendVendorSellList(this NetState ns, Serial vendor, List<SellItemState> list)
+        {
+            if (ns == null || !ns.GetSendBuffer(out var buffer))
+            {
+                return;
+            }
+
+            var writer = new CircularBufferWriter(buffer);
+            writer.Write((byte)0x9E); // Packet ID
+            writer.Seek(2, SeekOrigin.Current);
+
+            writer.Write(vendor);
+            writer.Write((ushort)list.Count);
+
+            for (var i = 0; i < list.Count; i++)
+            {
+                var sis = list[i];
+                var item = sis.Item;
+                writer.Write(item.Serial);
+                writer.Write((ushort)item.ItemID);
+                writer.Write((ushort)item.Hue);
+                writer.Write((ushort)item.Amount);
+                writer.Write((ushort)sis.Price);
+
+                var name = (item.Name?.Trim()).DefaultIfNullOrEmpty(sis.Name ?? "");
+
+                writer.Write((ushort)name.Length);
+                writer.WriteAscii(name);
+            }
+
+            writer.WritePacketLength();
+            ns.Send(ref buffer, writer.Position);
+        }
+
+        public static void SendEndVendorSell(this NetState ns, Serial vendor)
+        {
+            if (ns == null || !ns.GetSendBuffer(out var buffer))
+            {
+                return;
+            }
+
+            var writer = new CircularBufferWriter(buffer);
+            writer.Write((byte)0x3B); // Packet ID
+            writer.Write((ushort)8);
+            writer.Write(vendor);
+            writer.Write((byte)0);
+
+            ns.Send(ref buffer, writer.Position);
+        }
+    }
+}