fish: Add an alias for opening fugitive in neovim

This gives us access to git status in fugitive easily to carry out
further git operations.

fish/.config/fish/config.fish

@@ -47,6 +47,9 @@ alias et="emacsclient ~/org/todo.org"
 alias vg="vgrep"
 alias vs="vgrep -s"
 
+# Open fugitive with nvim directly
+alias gn="nvim -c Git"
+
 # Branch (b)
 alias gb='git branch'
 alias gba='git branch --all --verbose'