pre-commit auto remove trailing whitespace from h files (#385)

Another big auto clean up by pre-commit similar to the others

(cherry picked from commit 5d328669834268fa077da8fd0d9b44cc5ce2793b)

pre-commit(end-of-file-fixer): auto fix `.h` files (#281)

(cherry picked from commit a21bd2ce297ef7601e65314a01b713e0914864f0)

Merge main/cosv and main/udm into main/autodoc.

main/autodoc depends on main/cosv and main/udm.
main/udm depends on main/cosv.
No other module depends on main/cosv or main/udm.
The only deliverable

Merge main/cosv and main/udm into main/autodoc.

main/autodoc depends on main/cosv and main/udm.
main/udm depends on main/cosv.
No other module depends on main/cosv or main/udm.
The only deliverable from main/autodoc is the autodoc executable -
there are no libraries, and all headers remain private and undelivered.

We might even be able to use some third-party documentation generator
instead of autodoc, perhaps Doxygen. Whether we should go that way is debatable,
but there is no point in littering main/ with 2 modules and littering solver/
with many headers and 2 static libraries just so autodoc can consume them.
Rather make their code internal to autodoc.

Patch by: me

(cherry picked from commit 11c03c6d381fea19f0fea13ae5a371ba50bad241)

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