Add WezTerm support

[alexherbo2]

https://wezfurlong.org/wezterm/

[alexherbo2]

Just started experimenting. For the time being, we can do:

~/.config/kak/kakrc

# Windowing
hook global ModuleLoaded x11 %{
  set-option global termcmd 'wezterm start -- dash -c'
}

[lenormf]

Does this need to be built-in? The project is very young, doesn't have packages in distributions, probably not many users either — maybe it's best support is implemented via kakrc only for now.

[alexherbo2]

For splits and reference: wez/wezterm#533