List should support pagination with a documented default and max limit

As shown by #73 the number of returned elements is 5000 but there are no means to get the next elements.
List should implement a pagination mechanism.
Also the default page size should be set to a much smaller value than the max 5000, so that it take I/O Runtime memory and request/response size limits into account.

Start by reading issue #73 and tracing the existing List API in aio-lib-files. Determine how pagination, the default page size, and the maximum limit should be represented and documented. Done means callers can retrieve elements beyond 5000 and the default and maximum limits are documented and covered by tests.

Written by the indexing model from the issue text.