feature: Remember tmux zoom setting

[mixtli]

Did you check the docs?

• I have read all the zen-mode.nvim docs

Is your feature request related to a problem? Please describe.

I run in tmux and am usually "zoomed" in on the editor so I can't see my other panes (Using prefix-z in tmux). When I trigger zen mode in neovim and then toggle it back off, my full tmux window pops open, even if it was zoomed before, which is quite jarring.

Describe the solution you'd like

I'd like the plugin to remember the tmux zoom state and restore it when toggling off zen mode.

Describe alternatives you've considered

Right now, whenever I toggle off zen mode, I just manually re-enter zoom mode in tmux.

Additional context

No response