Added room functionality

Websockets/WebsocketManager.cs

@@ -0,0 +1,38 @@
+using System.Net.WebSockets;
+
+namespace MauMau_Server.Websockets;
+
+public class WebsocketManager : IWebsocketManager
+{
+    private static readonly Dictionary<string, WebSocket> Connections = new();
+
+    public string AddConnection(WebSocket socket)
+    {
+        var id = Guid.NewGuid().ToString();
+        Connections.Add(id, socket);
+        return id;
+    }
+    
+    public WebSocket GetConnection(string id)
+    {
+        return Connections[id];
+    }
+    
+    public Dictionary<string, WebSocket> GetAllConnections()
+    {
+        return Connections;
+    }
+    
+    public void RemoveConnection(string id)
+    {
+        Connections.Remove(id);
+    }
+}
+
+public interface IWebsocketManager
+{
+    public string AddConnection(WebSocket socket);
+    public WebSocket GetConnection(string id);
+    public Dictionary<string, WebSocket> GetAllConnections();
+    public void RemoveConnection(string id);
+}