Initial migration commit to .NET 7

Menu, sync and other stuff except resource system should be working.
We're far from finished

Client/Scripts/Networking/Statistics.cs

@@ -7,9 +7,9 @@ namespace RageCoop.Client
     {
         static Statistics()
         {
-            Task.Run(() =>
+            ThreadManager.CreateThread(() =>
             {
-                while (true)
+                while (!Main.IsUnloading)
                 {
                     var bu = Networking.Peer.Statistics.SentBytes;
                     var bd = Networking.Peer.Statistics.ReceivedBytes;
@@ -17,7 +17,7 @@ namespace RageCoop.Client
                     BytesUpPerSecond = Networking.Peer.Statistics.SentBytes - bu;
                     BytesDownPerSecond = Networking.Peer.Statistics.ReceivedBytes - bd;
                 }
-            });
+            },"Statistics");
         }
 
         public static int BytesDownPerSecond { get; private set; }