Converts Item & Entity Packets (#326)

- [X] Converts World Item packets
- [X] Converter Remove Entity packets
- [X] Updates `LOSBlocker` and `Blocker`
- [X] Fixes a few bugs
- [X] Converts container packets

Bumps release version

Projects/Server/Network/Packets/OutgoingEntityPackets.cs

@@ -0,0 +1,73 @@
+/*************************************************************************
+ * ModernUO                                                              *
+ * Copyright 2019-2020 - ModernUO Development Team                       *
+ * Email: hi@modernuo.com                                                *
+ * File: OutgoingEntityPackets.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;
+using System.Buffers;
+
+namespace Server.Network
+{
+    public static class OutgoingEntityPackets
+    {
+        public const int OPLPacketLength = 9;
+        public const int RemoveEntityLength = 5;
+
+        public static void CreateOPLInfo(ref Span<byte> buffer, Item item) =>
+            CreateOPLInfo(ref buffer, item.Serial, item.PropertyList.Hash);
+
+        public static void CreateOPLInfo(ref Span<byte> buffer, Serial serial, int hash)
+        {
+            var writer = new SpanWriter(buffer);
+            writer.Write((byte)0xDC); // Packet ID
+            writer.Write(serial);
+            writer.Write(hash);
+        }
+
+        public static void SendOPLInfo(this NetState ns, IPropertyListObject obj) =>
+            ns.SendOPLInfo(obj.Serial, obj.PropertyList.Hash);
+
+        public static void SendOPLInfo(this NetState ns, Serial serial, int hash)
+        {
+            if (ns == null)
+            {
+                return;
+            }
+
+            Span<byte> buffer = stackalloc byte[OPLPacketLength];
+            CreateOPLInfo(ref buffer, serial, hash);
+
+            ns.Send(buffer);
+        }
+
+        public static void CreateRemoveEntity(ref Span<byte> buffer, Serial serial)
+        {
+            var writer = new SpanWriter(buffer);
+            writer.Write((byte)0x1D); // Packet ID
+            writer.Write(serial);
+        }
+
+        public static void SendRemoveEntity(this NetState ns, Serial serial)
+        {
+            if (ns == null)
+            {
+                return;
+            }
+
+            Span<byte> buffer = stackalloc byte[RemoveEntityLength];
+            CreateRemoveEntity(ref buffer, serial);
+
+            ns.Send(buffer);
+        }
+    }
+}