Plotting with xarray

[deltamarnix]

The quickstart contains plotting, we should be able to use the xarray plotter instead of the custom flopy plotters.

[mjreno]

• baseline plotting for quickstart #118

Plotting is still being evaluated but at this point it seems that directly plotting a Xarray data array won't be sufficient when the grid should also be accurately represented. There are several approaches still being evaluated:

• directly implement plotting in pyphoenix, e.g. see qsplot.py in the PR for an example
• use xugrid or other library that supports plotting of the data with an accurate grid representation
• use Flopy, e.g. see quickstart.py in the PR. This is currently compromised see Should pyphoenix objects implement flopy3 utility interfaces? #113

Additional work is ongoing so leaving this issue open for now.

[wpbonelli]

the quickstart is using xarray now so I think this can be closed