Missing docstrings #4
Description
Most docstring for function and classes are missing, this should be added in order to be automatically added to the online documentation here : https://marge-3d-solver.readthedocs.io/en/latest/api/marge3d/index.html
Don't hesitate to look at other examples online, for instance the [docstrings of qmat.lagrange] (https://github.com/Parallel-in-Time/qmat/blob/main/qmat/lagrange.py), that summarize most of the possible docstring formating (item lists, examples, math equations, etc ...)