cleanup and simplify the CoD RCon implementation

SharedLibraryCore/Exceptions/RConException.cs

@@ -4,8 +4,15 @@ namespace SharedLibraryCore.Exceptions
 {
     public class RConException : Exception
     {
+        public bool IsOperationCancelled { get; }
+        
         public RConException(string message) : base(message)
         {
         }
+        
+        public RConException(string message, bool isOperationCancelled) : base(message)
+        {
+            IsOperationCancelled = isOperationCancelled;
+        }
     }
-}
+}