- move most orb to uORB::Publication and uORB::Subscription
- update legacy message handling (warn to PX4_INFO, PX4_WARN, PX4_ERR)
- add perf counters
- sensors/mag support newer `uavcan::equipment::ahrs::MagneticFieldStrength2` message
- sensors/gps support `uavcan::equipment::gnss::Auxiliary` for hdop and vdop
- sensors delete obsolete ioctl and read methods
- use PublicationMulti for actuator_outputs and esc_reports (to coexist with other output modules)
- add GNSS parameter metadata (parameters_injected.xml)