IAsyncEnumerable<TItem> Continuation Token Paging Implementation

[mumby0168]

This library currently has a few paging implementations. None of which yet support streaming. It would be great to add one that returns an IAsyncEnumerable<TItem> for scenarios where data would benefit from being streamed. This is a great fit for use with continuation tokens.

A possible API might be something like below:

IAsyncEnumerable<TItem> PageAsync(
            Expression<Func<TItem, bool>> predicate = null,
            int? maxResults = null,
            int pageSize = 25,
            CancellationToken cancellationToken = default);

This could potentially allow a caller to either get all the results returned by the predicate or specify a limit of how many items they would like back.

This under the hood would make use of continuation tokens to provide efficient, cost-effective paging.