KApiDox move from dedicated server to Jenkins

[Frederik Schwarzer]

Hi,

we have been working on getting KApiDox to run on Jenkins. This work has 
been taken way longer than I expected but has now reached a state close 
to finished. :)

So I would like to invite you to check https://api-dev.kde.org/ for any 
show stoppers.

Known issues (not show stoppers):

- For now the Maintainers field defaults to "KDE Developers" for 
potential GDPR violation reasons, which needs to be figured out later.

- Some modules contain formatting issues regarding markdown code blocks. 
These are also there in the current system and need to be checked at 
some point.

- The "Older versions" links are broken. Since those docs are not 
generated anymore, we need to figure out a way to have them available 
statically.

If we do not see any bigger issues, I would like to go live with the new 
system in a week or two.

Thanks for your help.

CHeers,
Frederik