Cross-link streams and manifests with dpid.org/browse and/or nodes.desci.com

[m0ar]

The raw stream/event/manifest lists aren't the best experience for a curious newcomer, so the cards should link to viewing them in a gateway.

Notes:

• need dpid.org/browse/:streamOrCommit route
  • requires reverse dpid lookup support in dpid-resolver
• need dpid.org/browse/:manifest route
  • requires reverse manifest lookup support in dpid-resolver
• nodes.desci.com/dpid/:streamID exists, unsure if it supports commitID's
  • no reverse manifest lookup available, prob not easy to do