Add aruco detector parameter file

[sfalexrog]

Since the current master has a fully configurable aruco detector, I believe it would be nice to have an example of using a .yaml file to configure detector parameters at launch time. This may be considered more as a piece of documentation than something that is necessary.

I am hesitant to use the same approach in clover's aruco.launch, though.

Another thing that would be nice is to have better default parameters (as tested by @goldarte). At the very least we should set minMarkerPerimeterRate to a sensible value to avoid crashes.