add remaining rate limit to client log

src/Discord.Net.Rest/BaseDiscordClient.cs

@@ -57,7 +57,7 @@ namespace Discord.Rest
                 if (info == null)
                     await _restLogger.VerboseAsync($"Preemptive Rate limit triggered: {endpoint} {(id.IsHashBucket ? $"(Bucket: {id.BucketHash})" : "")}").ConfigureAwait(false);
                 else
-                    await _restLogger.WarningAsync($"Rate limit triggered: {endpoint} {(id.IsHashBucket ? $"(Bucket: {id.BucketHash})" : "")}").ConfigureAwait(false);
+                    await _restLogger.WarningAsync($"Rate limit triggered: {endpoint} Remaining: {info.Value.RetryAfter}s {(id.IsHashBucket ? $"(Bucket: {id.BucketHash})" : "")}").ConfigureAwait(false);
             };
             ApiClient.SentRequest += async (method, endpoint, millis) => await _restLogger.VerboseAsync($"{method} {endpoint}: {millis} ms").ConfigureAwait(false);
         }
@@ -257,6 +257,6 @@ namespace Discord.Rest
         /// <inheritdoc />
         Task IDiscordClient.StopAsync()
             => Task.Delay(0);
-        #endregion 
+        #endregion
     }
 }