feat: Table.topk()

[NickCrews]

Is your feature request related to a problem?

I like the Table.value_counts() API and have been using it a lot. However, the thing I always do next is to order it. Can we turn this into a oneliner, similar to Value.topk()?

What is the motivation behind your request?

No response

Describe the solution you'd like

same API as Value.topk()

What version of ibis are you running?

main

What backend(s) are you using, if any?

No response

Code of Conduct

• I agree to follow this project's Code of Conduct

[cpcloud]

Are you always sorting by something in particular? If so, is it the count?

[NickCrews]

So far I've only ever wanted count. If we wanted to limit the scope to just that I think it would be just fine.