Add metainfo.yaml
This is needed to make the documentation available on api.kde.org
A preview can be found at https://kf6.juliuskuenzel.eu/jlskuz-libkeduvocdocument/html/index.html
This is needed to make the documentation available on api.kde.org
A preview can be found at https://kf6.juliuskuenzel.eu/jlskuz-libkeduvocdocument/html/index.html