[Iron] Added stereo calibration using aruco markers

[MRo47]

This was a TODO in the repository, opening this PR to add this feature.

• The main issue why this wasn't possible imo is the way mk_obj_points works. I'm using the inbuilt opencv function to get the points there.
• The other is a condition when aruco markers are detected they are added as good points, This is fine in case of mono but in stereo these have to be the same number as the object points to find matches although this should be possible with aruco.
• This also has the dictionary name corrections I mentioned in #971

Noob to contributing in this repo, any guidelines, rules I should be following before doing PR's here?