feat: Adds a memory mirrored ring buffer for networking. (#1533)

## Breaking Changes

Incoming packet registration signature has changed to:
```cs
delegate* void OnReceiveCallback(NetState state, SpanReader reader, int packetLength);

IncomingPackets.Register(int packetID, int length, bool ingame, OnReceiveCallback onReceive);
```

For example, an incoming packet handler signature would now look like this:
```cs
public static void SomeIncomingPacket(NetState state, SpanReader reader, int packetLength)
{
    // Parse the data
}
```

## Summary

Updates the network Pipe class to use a mirrored memory technique. This technique involves mapping the same physical memory to two contiguous virtual memory spaces so the byte buffer appears duplicated. This allows writing to a double-sized array to wrap around without the need for the `CircularBuffer` classes.

In practice this allows us to use `Span<byte>` as if the buffer was a regular array.


### Bug Fixes

- [X] Fixes bad fixed length string parsing

Projects/UOContent/Network/MapUO.cs

@@ -29,14 +29,14 @@ public static class MapUO
         AssistantProtocol.Register(0x01, true, &QueryGuildMemberLocations);
     }
 
-    public static void QueryGuildMemberLocations(NetState state, CircularBufferReader reader, int packetLength)
+    public static void QueryGuildMemberLocations(NetState state, SpanReader reader, int packetLength)
     {
         Mobile from = state.Mobile;
 
         state.SendGuildMemberLocations(from, from.Guild as Guild, reader.ReadBoolean());
     }
 
-    public static void QueryPartyMemberLocations(NetState state, CircularBufferReader reader, int packetLength)
+    public static void QueryPartyMemberLocations(NetState state, SpanReader reader, int packetLength)
     {
         Mobile from = state.Mobile;
         var party = Party.Get(from);