We need to add a startup warning to alert macOS users when their installed tmux version is vulnerable to a…

We need to add a startup warning to alert macOS users when their installed tmux version is vulnerable to a…: a task in LegoFlow-SWE (Harbor dataset). Parse the raw output of tmux -V . Examples: - "tmux 3.6a\n" → "3.6a" - "tmux master" → "master" - "tmux next-3.7" → "next-3.7"