shell: nushell integration scripts (#4630)

Co-authored-by: imsys <911254+imsys@users.noreply.github.com>
Co-authored-by: Grzegorz Zalewski (Greg) <12560152+zalewskigrzegorz@users.noreply.github.com>
Co-authored-by: René Jochum <rene@jochum.dev>
Co-authored-by: Junegunn Choi <junegunn.c@gmail.com>
Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

uninstall

@@ -114,6 +114,9 @@ if [ -d "${fish_dir}/functions" ]; then
   fi
 fi
 
+nushell_autoload_dir=${XDG_CONFIG_HOME:-$HOME/.config}/nushell/autoload
+remove "${nushell_autoload_dir}/_fzf_integration.nu"
+
 config_dir=$(dirname "$prefix_expand")
 if [[ $xdg == 1 ]] && [[ $config_dir == */fzf ]] && [[ -d $config_dir ]]; then
   rmdir "$config_dir"