Added Description property to EndpointOptions classes. Updated client info string representation, added additional validation for Spot endpoints

CryptoExchange.Net/SharedApis/Models/Options/Endpoints/GetSpotTriggerOrderOptions.cs

@@ -1,4 +1,5 @@
-using System;
+using CryptoExchange.Net.Objects;
+using System;
 using System.Collections.Generic;
 using System.Text;
 
@@ -9,11 +10,23 @@ namespace CryptoExchange.Net.SharedApis
     /// </summary>
     public class GetSpotTriggerOrderOptions : EndpointOptions<GetOrderRequest, ISpotTriggerOrderRestClient>
     {
+        /// <inheritdoc />
+        public override string Description => "Retrieve a spot trigger order";
+
         /// <summary>
         /// ctor
         /// </summary>
         public GetSpotTriggerOrderOptions(string exchange, bool authenticated) : base(exchange, authenticated, nameof(ISpotTriggerOrderRestClient.GetSpotTriggerOrderAsync))
         {
         }
+
+        /// <inheritdoc />
+        public override Error? ValidateRequest(GetOrderRequest request, ISpotTriggerOrderRestClient client)
+        {
+            if (request.Symbol!.TradingMode != TradingMode.Spot)
+                return ArgumentError.Invalid("TradingMode", $"TradingMode.{request.Symbol!.TradingMode} is not supported, should be Spot");
+
+            return base.ValidateRequest(request, client);
+        }
     }
 }