Add full workflow of use case example

[paigem]

Feature request: It would be helpful for users to see a full workflow of using xnemogcm, and seeing how it fits together with xgcm and how that can be used for analysis.

This is a suggested feature request, but is not one that will hold up my review. 🙂

One of the primary motivations listed for why xnemogcm is a useful package is that it can be used in conjunction with xgcm. At the moment, the only example of using xnemogcm with xgcm is in the very short "Usage" text in the README. This "Usage" text is great, but I think it would be even more helpful to have a more complete use case example that (for instance) opens up some NEMO data, uses xnemogcm and then uses xgcm to do some sort of standard ocean analysis, ideally resulting in a nice plot. Specifically, it would be nice to have a script that can be run locally, e.g. with a small subset of NEMO data (the "Usage" section as it stands cannot be run unless the user already has access to NEMO data) that demonstrates a full sample workflow.

[rcaneill]

I wrote an example in the xgcm documentation for NEMO: https://xgcm.readthedocs.io/en/latest/xgcm-examples/04_nemo_idealized.html Thus, I do not think that it would be necessary to redo it in the xnemogcm doc. However, I should add the link the the xgcm doc.

(I updated the xgcm example, but it is not merged yet)

[rcaneill]

(I let you reopen this issue if you think that more work would be needed)