This is a follow-on idea from #8540, particularly #8540 (comment) and #8540 (comment) . The idea is to add another way of creating TimeSeries by doing time.series() (where time is a Time object).

TBD: whether keywords should be allowed to have more control of TimeSeries creation - e.g. adding more data columns.

(I'm initially milestoning it for 4.0 but it could get pulled up to 3.2 as a quick follow-on to #8540 if I find time and someone can review it by tomorrow.)