[feat]: add support for `fish` shell

[mikaoelitiana]

This project looks really interesting to me as I am looking for an Emdash alternative that runs inside the terminal. I am a fish shell user thought and the one line install does not work with it.

Here is the error message I get :

fish: Invalid redirection target:
bash <(curl -s https://raw.githubusercontent.com/thisguymartin/grove/main/install/install.sh)
     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^
If you wish to use process substitution, consider the psub command, see: `help cmds/psub`