new wezterm cli set-environment-vars for all panes in a Tab / MuxWindow

[MartyMcFlyInTheSky]

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

I want to use one neovim instance per Pane or MuxWindow, essentially reusing the started up neovim instance in say pane 1 to open the files when I enter nvim file.txt from pane 2. The way I pictured this to work is to start nvim with the --listen option in one pane and update the NVIM_LISTEN_ADDRESS environment variable for all panes in the Tab/MuxWindow at the same time. Neovim instances launched in other panes would then check for that environment variable and add the --server flag to connect to the specified neovim instance.

I was kinda excited when AI hallucinated a really convenient solution here, which would be to use wezterm-cli to target all panes in the MuxWindow and update environment variables for it. It fabricated something like this:

wezterm cli set-environment-vars --pane-id all "export LISTEN_ADDRESS=some_named_pipe"

But unfortunately there's no set-environment-vars subcommand and neither is there a --pane-id all target. It would be very nice and convenient to have it! Also to target not only panes but Tabs and MuxWindows.

Remark: I'm also interested in other solutions to the issue I'm trying to solve. I think it's probably something that could be solved with events but it sounds cumbersome.