You should not do that. Things can break. Your user configurations are stored in .config and Your System configurations stored in /etc/ are used by your system. I wouldn’t recommend it.
Programs may read from /etc, but it’s not recommended. Instead, I recommend having your .config directory stored somewhere, or preferably, have all configs in a git repository (often called dotfiles) and deploy them on systems for example with stow
Is it possible to tell my OS that it’s always going to have only 1 non-root user and relocate all the
~/.configinto/etc?You should not do that. Things can break. Your user configurations are stored in .config and Your System configurations stored in /etc/ are used by your system. I wouldn’t recommend it.
Programs may read from /etc, but it’s not recommended. Instead, I recommend having your .config directory stored somewhere, or preferably, have all configs in a git repository (often called dotfiles) and deploy them on systems for example with
stow