Use the new code-sample directive and roles to document the networking
samples so that they show up as "Related samples" when browsing the
various relevant networking APIs.
Signed-off-by: Benjamin Cabé <benjamin@zephyrproject.org>
This change enables support for DNS service discovery
(RFC 6763) in the mdns_responder service and sample app.
Fixes#29429
Signed-off-by: Christopher Friedt <chrisfriedt@gmail.com>