feat(config): single-purpose deleagted routing endpoints

this is poc of optional configuration that would allow for
IPNS-only and Peer-only endpoints.

unsure how useful this would be in real world, my assumption is that
single config is better and also encourages people to
decentralize/federate routing systems with tools like
https://github.com/ipfs-shipyard/someguy
which exposes providers+peers+ipns