New organization

Creating a new organization is an action that opens up a completely new workspace in the system — its own customers, products, calendars, settings, and invoicing. The `/new` wizard is therefore intentionally minimalistic: it only asks for what cannot be automatically deduced or filled in later, and leaves everything else to specialized modules, to which the user switches after the first login. The goal is for the first step to be trivial and for decisions like "what color or emoji" not to become an obstacle when creating an account.