The default breathe project is `Zephyr`, so there is no need to specify it. Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
We did not have any reference to queues and doxygen information were not linked correctly. Add a placeholder and pull in doxygen data so whenever someone adds a reference, a link is created. Signed-off-by: Anas Nashif <anas.nashif@intel.com>