feat: Updates to .NET 8. (#1542)

### Breaking Changes
- Updating to .NET 8 - Required O/S's have slightly changed.

Projects/Server/Utilities/Utility.cs

@@ -8,7 +8,6 @@ using System.Net.Sockets;
 using System.Runtime.CompilerServices;
 using System.Text;
 using System.Xml;
-using Microsoft.Toolkit.HighPerformance;
 using Server.Buffers;
 using Server.Collections;
 using Server.Logging;