Use the new code-sample directive and roles to document the zbus samples
so that they show up as "Related samples" when browsing zbus API.
Signed-off-by: Benjamin Cabé <benjamin@zephyrproject.org>
The work_queue sample illustrates three reaction styles available for
using zbus. The first is a listener that reacts by callback; use it should
for urgent reaction. The second is a listener that responds by callback;
instead of executing the code, it pushes a job to a work queue that will
be executed shortly but not immediately. The last one is the subscriber
that reacts using a queue; use it for an asynchronous reaction where the
developer would like to control the flow.
Signed-off-by: Rodrigo Peixoto <rodrigopex@gmail.com>
