GameServer + packet types, we aren't parsing yet

AscNet.GameServer/Server.cs

@@ -0,0 +1,54 @@
+using System.Net.Sockets;
+using System.Net;
+using AscNet.Common.Util;
+
+namespace AscNet.GameServer
+{
+    public class Server
+    {
+        public static readonly Logger c = new(nameof(GameServer), ConsoleColor.Cyan);
+        public readonly Dictionary<string, Session> Sessions = new();
+        private static Server? _instance;
+        private readonly TcpListener listener;
+
+        public static Server Instance
+        {
+            get
+            {
+                return _instance ??= new Server();
+            }
+        }
+
+        public Server()
+        {
+            listener = new(IPAddress.Parse("0.0.0.0"), Common.Common.config.GameServer.Port);
+        }
+
+        public void Start()
+        {
+            for (; ; )
+            {
+                try
+                {
+                    listener.Start();
+                    c.Log($"{nameof(GameServer)} started and listening on port {Common.Common.config.GameServer.Port}");
+
+                    for (; ; )
+                    {
+                        TcpClient tcpClient = listener.AcceptTcpClient();
+                        string id = tcpClient.Client.RemoteEndPoint!.ToString()!;
+
+                        c.Warn($"{id} connected");
+                        Sessions.Add(id, new Session(id, tcpClient));
+                    }
+                }
+                catch (Exception ex)
+                {
+                    c.Error("TCP listener error: " + ex.Message);
+                    c.Log("Waiting 3 seconds before restarting...");
+                    Thread.Sleep(3000);
+                }
+            }
+        }
+    }
+}