Have a separate welcome email

Currently when a user is created, an account recovery flow is started. Kratos sends a recovery email to the user so they can set their password for the first time. This works, but the text in the email is necessarily general in nature because it's used for later recoveries as well.

We would like to be able to send a welcome email that's specific to the context. It should of course be possible to set the text as a helm value so individual clusters can override it.

This is already possible by using the Kratos api to create a recovery link instead of starting a flow, see here. It's not trivial though because then we'll have to send the welcome email outselves, so we'll need to set up outgoing email from the dashboard which we currently don't have.

added App::Dashboard UX labels

There's an issue to make it possible to send the email directly from Kratos instead, but that will likely not have a way to set a custom welcome text distinct from the recovery scenario.