Provide conda packages

[adeas31]

Currently we only provide official pip packages to install OMPython. Add support for conda packaging as well.

[adeas31]

I am waiting for this one conda-forge/staged-recipes#31074 to get through.

Perhaps we can continue with our usual pip release instead of waiting for this one. Everything marked for 4.0.0 is in place now.

[adeas31]

OMPython is available as conda package now https://anaconda.org/conda-forge/ompython