Add PagingQueryableExtensions for Marten

Product

Green Donut

Is your feature request related to a problem?

Currently there is no support for ToPageAsync extension method's when using Hotchocolate.Data.Marten.

Existing EntityFrameworkCore version

public class GetBrandQueryHandler(CatalogContext context)
    : IRequestHandler<GetBrandsQuery, Page<Brand>>
{
    public async Task<Page<Brand>> Handle(
        GetBrandsQuery request,
        CancellationToken cancellationToken)
        => await context.Brands
            .With(request.Query, s => s.AddAscending(t => t.Id))
            .ToPageAsync(request.PagingArguments, cancellationToken);
}

The solution you'd like

I would like to implement it so that it has the same signature as Hotchocolate.Data.EntityFrameworkCore.

Marten (not implemented)

public class GetBrandQueryHandler(IDocumentSession session)
    : IRequestHandler<GetBrandsQuery, Page<Brand>>
{
    public async Task<Page<Brand>> Handle(
        GetBrandsQuery request,
        CancellationToken cancellationToken)
        => await session.Query<Brand>()
            .With(request.Query, s => s.AddAscending(t => t.Id))
            .ToPageAsync(request.PagingArguments, cancellationToken);
}

Start by locating the existing HotChocolate.Data.EntityFrameworkCore ToPageAsync implementation and the Marten integration entry points. Compare their paging signatures and behavior with the handler examples in this issue, then add the corresponding Marten extension and verify that the shown session.Query() usage supports the same PagingArguments and cancellation token.