Reusable toml files for dev and deployment in server

The server uses trustauth as a dependency only for testing. When deploying, the Dockerfile (rightly) doesn't COPY rustsystem-trustauth.

It's currently listed as a dev-dependency, but compilation still fails because it doesn't exist in the containerized namespace

The workspace toml files are currently split up due to the same reason (workspace members are only copied as needed). There might be a more elegant way of doing this.