fix(output): tmux supports OSC 10 & 11

[aymanbagabas]

Tmux supports OSC 10 & 11 since tmux 2.6 https://github.com/tmux/tmux/blob/b55f34029ac05474dfd993c187b9c61bbcd4e1a1/CHANGES#L1164

[muesli]

We need to be careful here: tmux supports setting the colors now via 10/11, but querying is still impossible (multiple terminals connected can have diverging color settings).

[meatcar]

I'd like to voice my support for this PR (once conflicts are resolved), or something like it.

Per tmux/tmux#3582 tmux supports querying via OSC11. Tmux reports the colors of the first terminal to attach to a tmux session. If the terminal's settings change, re-attaching to the tmux session is sufficient. The thread in #158 agrees that it's ok to trust tmux's OSC11 response.

At the moment tools that use termenv (like jjui, via lipgloss) don't detect the color scheme when run in tmux. A work around is to mess with TERM, but it would be really nice if everything just worked out-of-the-box.