change the SHELL but no the default shell

[amtoine]

as i've been living in nushell all day long for quite a while now, i feel using bash as the shell for things like make and fzf does not make sense...
i also think of bspwm and the scripts, why not changing the shell? 😋

it's not pretty, tideous to write and error prone, and simply does not fit in a nushell based workflow

the idea

for instance, fzf can use some other shell, for the previews, when the SHELL environment variable is set to something else than /bin/bash

this does not change the default shell, i.e. the one you'll drop in when you go to a tty 👍
i've tried to change SHELL to nu in both my ~/.config/nushell/env.nu and .bashrc and i still drop in bash when i open a tty 👌