* drivers/uavcannode: Add a simple parameter server
Added a simple parameter server using the libuavcan ParamServer class.
The parameter server exposes a selection of PX4 parameters via UAVCAN.
Also, Increased the stack size of the uavcan work queue in order to
prevent a stack overflow.
* uavcannode: fetch all active PX4 parameters
Co-authored-by: Kenneth Thompson <ken@flyvoly.com>