Support for fastutil collections

It would be nice to support fastutil collection
The previous discussion: https://markmail.org/message/anwbtpgbvwh4ox4v#query:+page:1+mid:xqwwbpgh2ul46nst+state:results

I could do this by copy pasting https://github.com/FasterXML/jackson-datatypes-collections/tree/master/hppc and some parts from https://github.com/FasterXML/jackson-datatypes-collections/tree/master/eclipse-collections very literally, but maybe it's time to do some refactoring and introduce basic primitive collection serialization types for all primitive collection libraries, which specific libraries could subclass trivially?