Rest API pagination helper

[hillairet]

Grabbing and using the headers to paginate the Rest API calls is really a pain. This is the kind of things we should be able to standardize and handle in SPyLib.

[qw-in]

Off the top of my head, something like this would be nice:

class Token:
    def paginated_resource(path: str, **query_string) -> PaginatedResource
       ...

The PaginatedResource class then implements convenient methods such as an async iterator

Maybe it would be convenient if this shorthand worked as well?

async for product in token.paginated_resource('/products'):
    #...