Add terminal operation toList()

[minborg]

No description provided.

[julgus]

Java 16 and later versions have a default implementation of this method that is automatically optimizable by JPAStreamer. Thus no custom implementation is needed and a result list can be composed as follows:

List<Film> = jpaStreamer.of(Film.class) 
        .filter(Film$.title.startsWith("T")) 
        .toList(); 

This is the new equivalent of the terminal operation .Collector(Collections.toList()).