[Feature]: Enable the use of default comparer for ToSortedCollection

[Geccoka]

Describe the functionality desired 🐞

I'd like to have the same thing implemented in #879 for the ToSortedCollection method in the library itself. For now, I created an extension method myself:

    public static IObservable<IReadOnlyCollection<TObject>> ToSortedCollection<TObject, TKey>(this IObservable<IChangeSet<TObject, TKey>> source)
        where TObject : notnull, IComparable<TObject>
        where TKey : notnull => source.ToSortedCollection(Comparer<TObject>.Default);

Considerations

It would be nice to have this in the library as for the SortAndBind.

[JakenVeina]

Feel free to submit a PR, I'd say.