Kasey

feat(iroh): add ability to publish and resolve relay urls in mDNS

4

## Description Adds the ability to resolve and publish relay URLs over mDNS. This is off by default. RelayUrls are typically only used for hole punching, which likely is not...

We need a test that has: - One "server" endpoint that is long-lived - One "client" endpoint that continuously dies and restarts with the same endpoint id And shows that...

- Use a txt attribute to include a relay URL in the swarm discovery mdns packet - Include configuration to enable this feature, but it should be off by default

Go through all our public errors and ensure they have helpful documentation

Eg, in `iroh-base`, we have a trait `Ticket`, the method `Ticket::from_bytes` can return an `iroh-base::ticket::ParseError`, but there is no clean way to create a `ParseError`, since you would need to...

We want to do a through review of the public APIs in iroh in anticipation of the iroh 1.0 release, not only for their functionality and ease of use, but...

We have some cases where a publicly available error wraps a private error. This is unintentional, and those private errors should likely be made public, or at least double-checked.