Email notification when user registers

It would be great if there was an email notification to the admin(s) when a new user registers.

When you are a admin user, there should be a new checkbox active/visible on “profile --> notifications” which should be checked on default saying “Receive notifications for new user registrations”.

The received email should include the ID, username, name and maybe also email address of the new user as well as the project(s) the user is currently assigned to.