Support for SSO/OIDC

[hanneshier]

It would be great to have the option to use custom SSO endpoints, rather than being limited to Google or GitHub. For instance, we use Authentik in our small, volunteer-run NGO, which allows us to log in to all our services with a single password. I’m not sure how that would apply to the hosted version, but it would certainly be a great addition to the self-hosted version.