Standardize notebook names?

[TeaganKing]

It may be useful to have some standard notebook names (eg, obs comparisons, basic diagnostics, etc) across components.

One issue that prompted this is that seaice has a notebook titled seaice, which is confusing in the config file.

[TeaganKing]

A suggestion could be added to the contributing wiki page & existing notebook names could be updated

[TeaganKing]

One potential naming convention could be as follows: <region>_<variable>_<metric>_<comparisons>.ipynb

Notebooks will already be categorized under a header for, eg, atm, so the component is not needed in the title of the notebook.

Some examples of this might be renaming NMSE_PSL.ipynb and LIWG_SMB_diagnostic.ipynb to Global_PSL_NMSE_compare_obs_lens.ipynb and Greenland_SMB_visual_compare_obs.ipynb, respectively.