Add new button "Record screen" that allows to select a Screen Recording tool

Summary:
Adds a new button "Record screen" that allows to select a screen recording tool, currently Peek and SimpleScreenRecorder (and soon vokoscreen: https://phabricator.kde.org/D10390)

{F5698788}

Moved from Reviewboard: https://git.reviewboard.kde.org/r/130215/

Reviewers: ngraham, #spectacle, rkflx

Reviewed By: ngraham, #spectacle, rkflx

Subscribers: rkflx

Maniphest Tasks: T7841

Differential Revision: https://phabricator.kde.org/D10295