[LyX/master] Add support for the Elsevier CAS classes

[Jürgen Spitzmüller]

Am Samstag, dem 04.07.2026 um 16:13 +0200 schrieb Jürgen Spitzmüller:
> Am Samstag, dem 04.07.2026 um 13:55 +0200 schrieb Scott Kostyshak:
> > export/examples/Articles/Elsevier_CAS_%28Double_Column%29_lyx16
> >   export/examples/Articles/Elsevier_CAS_%28Double_Column%29_lyx20
> >   export/examples/Articles/Elsevier_CAS_%28Double_Column%29_lyx21
> >   export/examples/Articles/Elsevier_CAS_%28Double_Column%29_lyx22
> >   export/examples/Articles/Elsevier_CAS_%28Double_Column%29_lyx23
> 
> This seems to be a (more general) lyx2lyx problem, please keep it.
> Same for the other example.

Looking at the test logs it seems that many (all?) simply fail since
there is:

lyx2lyx warning: Converting 'tabularx'/'xltabular' table to normal
table.

which seems to make the tests error out. The warning itself makes
sense.

-- 
Jürgen