Log chain command failure exception

Author: ethanhann

src/InEngine.Core/Commands/Chain.cs

@@ -20,6 +20,7 @@ public override void Run()
                 }
                 catch (Exception exception)
                 {
+                    Log.Error($"Chain command failed at command #{x}", exception);
                     x.Failed(exception);
                     throw new CommandChainFailedException(x.Name, exception);
                 }