Migrate the "geoapi-netcdf" module to UCAR

[desruisseaux]

GeoAPI provides a geoapi-netcdf example module as a proof of concept of GeoAPI wrappers for UCAR netCDF library. This module is published in the public domain and has never been part of a formal release. It has been proposed to transfer this module to the UCAR organisation:

• https://github.com/Unidata/netcdf-java/issues/256
• https://github.com/Unidata/geoapi-netcdf-java

If accepted, the "geoapi-netcdf" module should be deleted from GeoAPI repository and the web site should redirect to UCAR web site.

[desruisseaux]

Work started during 2021 Joint ASF – OGC – OSGeo Code Sprint.

[desruisseaux]

CodeSprint work merged to UCAR repository and old code removed from GeoAPI repository.