add OSC52 "set clipboard" support to tvision internal text file editor control

[unxed]

just like here: unxed/turbo@59f54e3

[magiblot]

I have an idea on how to integrate clipboard support into the Turbo Vision API, but it's not going to be ready anytime soon.

[unxed]

Please keep in mind that clipboard support via far2l extensions would also be nice to do on the turbo vision side, so that all interactions with the terminal are in one place, and not distributed between turbo vision and turbo. Some details here.

[magiblot]

Mission accomplished 😎. Fixed as of ca1429f.

We support all clipboard interaction methods (Win32, macOS, X11, Wayland, far2l, OSC 52, paste via terminal).

And now the cut/copy/paste commands not only work with TEditor, but also TInputLine 😎.