Add a line printing the total hours and minutes worked on a day

[adwicki]

I would have so much more fun, if you add the following

_logger.LogContent($"Day Total Worked: {TimeSpan.FromMinutes(workingDay.Summaries.Sum(s => s.Duration.TotalMinutes)).ToString(@"hh\:mm")}");

to Toggl2VertecConverter.cs#L47

:)