Supported keywords and elements in documentation

[stefano2734]

Supported keywords and elements in documentation is necessary against unnecessary problems.

See keywords of version 2.21, same in 2.22
https://github.com/calculix/new_keywords/blob/main/keywords_calculix_221.txt

In 2.23: *Damage Initiation

[drlukeparry]

That's a good point. The documentation needs considerable improvement, although the underlying keywords available is not complete.

It is something I will look into consider in the future when I edit the documentation.

[stefano2734]

See example in readme.md of
https://github.com/calculix/pygccx