feat: Implement Arrow PyCapsule Interface about ibis

[jcrist]

Makes sense to me! Would we also want to implement __arrow_c_schema__ (as per the docs you linked)?

[kylebarron]

There's some ongoing discussion about this apache/arrow#39689 but my own understanding is that if you're exporting a "table" or "stream of batches", then you'd only implement the __arrow_c_stream__ method. While if you're defining your own arrow-compatible data types (which maybe ibis is), then on that data type or field object you could implement __arrow_c_schema__

[cpcloud]

We have a single extension type used when exporting complex-type data from the snowflake backend to pyarrow. It's really only for internal use at the moment. Unclear how it would interact with the effort here, but I don't think it should be a blocker as it's the only backend that has this issue and I'm pretty sure we can solve the problem that type is solving in some other way if we need to.

[jcrist]

Sounds good to me - I pushed up a quick PR to support this for ibis.Table types in #9143.