Add support for OSC-52 write-only clipboard access

Christian Muehlhaeuserrequested to merge
muesli/konsole:osc-52 into master

Implements OSC-52 write-only clipboard access. Already supported by a wide range of other terminals, including alacritty, foot, kitty, urxvt, wezterm, xterm, and others.

I've intentionally omitted read access to the clipboard as that comes with several security concerns, which should be discussed first.

BUG: 372116

Edited by Christian Muehlhaeuser

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