Make search in copy-mode case insensitive by default

[reegnz]

In tmux the search in copy-mode follows smart-case strategy, meaning it is case-insensitive if the search string is all lowercase, but switches to being case-sensitive when an uppercase character is included.

Would be great if this plugin could somehow make the search at least default to case insensitive search (wezterm does not seem to support smart-case currently but there is an issue for it already: wezterm/wezterm#6018)

As a workaround I've bound the CycleMatchType, but it becomes really annoying when I have to cycle to case-insensitive every time I want to search.

It would be great if we could somehow set the default for search to case insensitive, as it's a more sensible default than case-sensitive.