Add spectacle support

[JoshuaVandaele]

Add spectacle support

[sergix44]

Thanks for the input, it would be good to be able to support some well mantained clients for linux

[SrS2225a]

I think it is a neat idea. Another possible solution is to create a purpose plugin which is supposed to integrate services and actions on any application without having to implement them specifically, and will be shared between all kde applications that can use it. Information about how to create a purposed plugin can be found on kde's gitlab: https://invent.kde.org/frameworks/purpose

A year ago I actually made a pr to kde for like a plugin that allows you to define your own uploader service, but has not went anywhere since KDE wants to integrate it into Get New Stuff and is waiting for the design team to come up with a proof of concept, so I can give it to you as an example if you want.