dask and mpi4py added to dev deps based on conda-forge recipe
updated environment.yml
matplotlib moved from deps to "regular" deps based on feedback from Ryan
adjusted mkdocs-jupyter install since #31 is resolved
updated conda-setup/action.yml to support pip install if/when environment.yml is not available
when environment.yml is not available, the conda runner will install python=3.12 by default, checking for this regardless of the cache existing avoids errors wrt the python version
added binaries needed for MPI when a pip install is done
daskandmpi4pyadded to dev deps based on conda-forge recipemkdocs-jupyterinstall since #31 is resolved