Add ability to connect to peers using only PeerID

[herwig-]

when starting the js-peer and accessing localhost:3000
I miss the Field "PeerID to connect to" and the button "Get Multiaddrs"

see:

[2color]

At some point this was removed (not exactly sure why as I wasn't the one who removed it). We could potentially re-introduce and resolve PeerIDs to Multiaddrs using the delegated routing.

[herwig-]

it would be great to have an example where two peers find each other with the peer-id only (in the best case with a dht for detecting the multiadders)