Implement LobbyServer

LobbyServer/CommandPacket.cs

@@ -0,0 +1,19 @@
+namespace LobbyServer
+{
+    class CommandPacket
+    {
+        public Command Command { get; }
+        public string Content { get; }
+
+        public CommandPacket(Command command, string content)
+        {
+            Command = command;
+            Content = content;
+        }
+
+        public override string ToString()
+        {
+            return $"{Command.ToString()}\n{Content}";
+        }
+    }
+}