Call LogException(ex) rather than LogError(ex.ToString())

[Xpl0itR]

This will allow us to do something like ConsoleApp.LogException = ex => logger.LogCritical(ex, "Unhandled exception.");
It is better to allow the logger to format the exception.

[neuecc]

ConsoleApp.Log and LogError are just simple or system-level logging methods, so if you want to use logging actively, I think you should inject your own logger and use that instead.

[Xpl0itR]

@neuecc hi, of course in my handlers I inject ILogger properly, the main motivation behind this PR is here, when an exception is not caught in a handler and the exception is not ValidationException or ArgumentParseFailedException, it would be good to pass the exception to the logger.

[neuecc]

If you want to customize it that much, I think that part can be handled with filters, so we might not need to include it.