Here the initial patch to get a plasma subcategory on api.kde.org started,
as thought about by David E. in D26894.
Though this will need some further thinking what the concept of that
subcategory is. And how to help people with the naming clashes when it comes
to Plasma-the-workspace vs. Plasma-the-lib.

All that naming and descriptions have to be sorted out by you Plasma people,
I just can get you started here with this :)

So please someone commandeer this patch immediately, I have to pass on here
given no own resources to work on this.

And while there might be some people working on a successor for api.kde.org
generation, those naming and grouping concepts are orthogonal, you will need
to have an idea about this in any case, I think.

cd ~
mkdir plasmadox
cd plasmadox
~/path/to/kapidox/src/kapidox_generate ~/path/to/kdecoration/
firefox index.html &

To update after editing the metainfo.yaml:
rm * -r
~/path/to/kapidox/src/kapidox_generate ~/path/to/kdecoration/
*reload in firefox*