What this MR does / why does DuMux need it:
This MR makes sure the modules in doc/doxygen/modules.txt match the current dumux folder structure. Wrong and missing ingroups are corrected. Missing
\files are included, excess
\files are removed.
Related to #1178 (closed)
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does the new code follow the style guide?
do the test pipelines pass? (see guide on how to run pipelines for a merge request)
does your change affect public interfaces or behavior, or, does it introduce a new feature? If so, document the change in
all files have to end with a
\ncharacter. Make sure there is no
\ No newline at end of filecomment in "Changes" of this MR.