datafusion-geo

Add geo functionality extension to datafusion query engine.

Goals

1. Support multiple wkb dialects
2. Provide DataFusion user defined functions
3. Prefer using geos library if feature flag enabled

Useful Links

1. Ewkb format: https://github.com/postgis/postgis/blob/master/doc/ZMSgeoms.txt
2. PostGIS functions: https://postgis.net/docs/manual-dev/PostGIS_Special_Functions_Index.html