Add screen brightness alias

fish/.config/fish/config.fish

@@ -17,6 +17,7 @@ alias webtorrent "webtorrent -i -o /tmp/webtorrent --mpv --player-args='--sub-au
 alias ns "nix-shell -p"
 alias tmpdir "cd $(mktemp -d)"
 alias clean-git "git repack -a -d -f --depth=250 --window=250"
+alias light "brightnessctl -m | cut -d , -f 4"
 
 # Additional paths
 set PATH $PATH $HOME/.emacs.d/bin