As discusses in issue #531, there was no reason to include support for geopackage and dxf except that it wasn't implemented yet.
Hereby the implementation that (as far as I can see and test) works. It implements the extensions in a way identical to for instance the flatgeobuf extension, which is a community extension of the regular Geoserver. As I am not familiair enough with the WPS modules in Geoserver Cloud, I did not incorporate the WPS modules in this PR for both formats.
As discusses in issue #531, there was no reason to include support for geopackage and dxf except that it wasn't implemented yet.
Hereby the implementation that (as far as I can see and test) works. It implements the extensions in a way identical to for instance the flatgeobuf extension, which is a community extension of the regular Geoserver. As I am not familiair enough with the WPS modules in Geoserver Cloud, I did not incorporate the WPS modules in this PR for both formats.