Split one ECV folder and use all sections in the Jupyter Book

[crgoddard]

As discussed in the projections issue, there is a requirement from C3S to split the ECV hydro and cryo folders (if this is not a breaking change).

At the same time we can activate the subsections in the Jupyter Book. They can be labelled as follows in the table of contents (overwriting the folder names):

• Atmosphere Physics
• Atmospheric Composition
• Land Biosphere
• Land Hydrology
• Cryosphere
• Ocean

Thanks!

@malmans2 , @jpmartins83

[malmans2]

Hi there, I'm on it. Do you want to simplify the subfolder names and use these? ('Atmosphere_Physics', 'Atmospheric_Composition', 'Cryosphere', 'Land_Biosphere', 'Land_Hydrology', 'Ocean')

If yes, one notebook in main is affected:

- Satellite_ECVs/Atmospheric_composition_ECVs/satellite_satellite-methane_uncertainty_q01.ipynb
+ Satellite_ECVs/Atmospheric_Composition/satellite_satellite-methane_uncertainty_q01.ipynb

[malmans2]

My proposed changes are here: https://github.com/ecmwf-projects/c3s2-eqc-quality-assessment/pull/181