Request: aggregate fields within relay-style connections

[williamjallen]

I currently have a workload where I need a lot of aggregate information. It would be great to be able to query an aggregate field on Relay-style connection types, similar to the way Supabase handles aggregates. A brief look at PaginationManipulator.php makes it seem like a pretty straightforward thing to implement. I may be willing to implement this feature once a design is fully scoped out.