OSC 133 integration

[ambroisie]

With the latest tmux version featuring shell integration 1, it might be nice to integrate it into this prompt.

My primary use-case is navigating between previous/next prompts, and (if I find a good mapping for it) selecting the entirety of a command's output.

Ideally, I think agkozak-zsh-prompt should also take care of the command-output-related sequences through prexec/precmd hooks.

See 2 or 3 for some documentation about this escape sequence.

[ambroisie]

It seems I linked to the wrong issue/PR: tmux/tmux#3596.

[ambroisie]

I see that some terminal emulators already set this up as part of their own shell integration, if configured by the user (e.g: wezterm).

So perhaps this should be configurable through an option.