Port VW Simplifier from JTS

[pramsey]

As noted in #623, this simplifier has not been ported yet.

https://github.com/locationtech/jts/blob/0afbfb1956ec24912a8b4dc4edff0f1200442857/modules/core/src/main/java/org/locationtech/jts/simplify/VWLineSimplifier.java