Support osc52

[miekg]

Hi,

Thanks for this plugin, was just looking for something like this. It may be a nice enhancement to support osc52 as well, so cut&paste over ssh also works (if your terminal supports it, like ghostty for instance).

You can "just" use printf with the correct escapes, for some reason the text must be base64 encoded which might be a bit awkward to do in shell.

For background see https://miek.nl/2024/january/31/osc52-my-cut-paste-journey/