Make an utility that returns an iterator for objects in paginated responses.

[EnriqueSoria]

In some API clients I found myself doing these things:

class WegowClient(RequestsClient):
    def event_feed(self, page: int | None = None) -> EventFeedResponse:
        return self._perform_request(EventFeedEndpoint(page))

    def get_events(self) -> Iterable[Event]:
        """Returns an iterator containing all concerts"""
        next_page = None
        while True:
            response = self.event_feed(page=next_page)
            yield from response.events
            next_page = response.next_page
            if next_page is None:
                break

It would be nice to have a way to define in an Endpoint how its pagination works so we can easilly return yield all objects from a paginated endpoint.