Add Sort Order to getCollectionItems use case

[ekraffmiller]

For the SPA Q4 feature "Collection Page: all filtering options", we need to implement the Sort button on the collections page:

To support this, we need to update the CollectionSearchCriteria used in getCollectionItems use case, to include a sorting information. There are two allowed sort types: 'name' and 'date'. The sort order can also be specified as ascending or descending. See Dataverse Search API or more details.

[g-saracca]

Closing as it will be addressed in #229