first gnome extension.
- API ref https://gjs-docs.gnome.org/
- https://gitlab.com/jrahmatzadeh/how-to-create-a-gnome-shell-extension
- official guide https://gjs.guide/extensions/development/typescript.html
- some guide https://dev.to/dagimgdot/how-do-you-setup-your-gnome-extension-development-environment-1l5
- https://github.com/phoenixcreation/ip_indicator_gnome