spatial types

[matt-beanland]

Enhance to support spatial types mapped to neo4j point type.

https://neo4j.com/docs/cypher-manual/current/values-and-types/spatial

Will need a type using Ash.NewType

[matt-beanland]

AshGeo may be useful here although very PostGres/PostGIS https://github.com/bcksl/ash_geo