ToChunk增加异步Api

[ROMYIM]

Feature 特性

Task ToChunkAsync<TReturn>(Expression<Func<T1, TReturn>> select, int size, Func<FetchCallbackArgs<List<TReturn>>, CancellationToken, ValueTask> done, Cancellationtoken token = default);

简要描述原因

一般大数据操作后续都会涉及注入文件导出，请求调用等IO操作。及其需要异步API版本的支持

使用场景

       var streamWriter = new StreamWriter(File.OpenWrite(string.Empty));

        dto.Editable = !await freeSql.Select<SysFlowActivity>().WithLock()
            .Where(activity => activity.ObjId == appCaseList.ApplyId)
            .Where(activity => activity.FlowType == FlowType.ApplyOpenCase)
            .Where(activity => activity.Status != 0)
            .ToChunkAsync(100, async (args, token) =>
            {
                var data = args.Object;
                foreach (var d in data)
                {
                    await streamWriter.WriteLineAsync(d.Id);
                }
            })
            .AnyAsync(cancellationToken);