JoinQueue (#883)

* JoinQueue stalker port

* fix queues

---------

Co-authored-by: JerryImMouse <toperkas@gmail.com>

Content.Shared/_CP14/JoinQueue/MsgQueueUpdate.cs

@@ -0,0 +1,36 @@
+using Lidgren.Network;
+using Robust.Shared.Network;
+using Robust.Shared.Serialization;
+
+namespace Content.Shared._CP14.JoinQueue;
+
+/// <summary>
+///     Sent from server to client with queue state for player
+///     Also initiates queue state on client
+/// </summary>
+public sealed class MsgQueueUpdate : NetMessage
+{
+    public override MsgGroups MsgGroup => MsgGroups.Command;
+
+    /// <summary>
+    /// Total players in queue
+    /// </summary>
+    public int Total { get; set; }
+
+    /// <summary>
+    /// Player current position in queue (starts from 1)
+    /// </summary>
+    public int Position { get; set; }
+
+    public override void ReadFromBuffer(NetIncomingMessage buffer, IRobustSerializer serializer)
+    {
+        Total = buffer.ReadInt32();
+        Position = buffer.ReadInt32();
+    }
+
+    public override void WriteToBuffer(NetOutgoingMessage buffer, IRobustSerializer serializer)
+    {
+        buffer.Write(Total);
+        buffer.Write(Position);
+    }
+}