Added the abandon Kasino feature. Migrated to an extension method for formatting usernames

KfChatDotNetBot/Extensions/Extensions.cs

@@ -1,5 +1,6 @@
 using System.Text;
 using System.Text.RegularExpressions;
+using KfChatDotNetBot.Models.DbModels;
 
 namespace KfChatDotNetBot.Extensions;
 
@@ -130,4 +131,10 @@ public static class Extensions
         var charCount = Encoding.UTF8.GetCharCount(bytes, 0, limitBytes);
         return s.Substring(0, charCount);
     }
+
+    // Placeholder for future expansion involving custom titles
+    public static string FormatUsername(this UserDbModel user)
+    {
+        return $"@{user.KfUsername}";
+    }
 }