KDEReview for kio-s3

[Elvis Angelaccio]

Hi all,
I think kio-s3 [1] is now ready to go through the KDEReview process and 
get a first release.

dfaure and sitter did a first code review in the original MR against 
kio-extras [1]. The code hasn't changed much since then, mostly the port 
to the new WorkerBase interface.

Please have a look. Thanks :)

P.S.
You might notice that the gitlab CI is currently broken, I have already 
filed a sysadmin ticket trying to sort it out.

[1]: https://invent.kde.org/network/kio-s3
[2]: https://invent.kde.org/network/kio-extras/-/merge_requests/35


Cheers,
Elvis