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/NetState/NetState.cs

@@ -379,6 +379,11 @@ namespace Server.Network
 
         public void Send(ReadOnlySpan<byte> span)
         {
+            if (span == null)
+            {
+                return;
+            }
+
             var length = span.Length;
             if (Connection == null || BlockAllPackets || length <= 0 || !GetSendBuffer(out var buffer))
             {