DP3 support

This repository offers the possibility to use DP3 steps with a Visibility object as input/output.

Any step can be used via the function ska_sdp_func_python.util.dp3_utils.process_visibilities(), where the desired step is given via the step parameter. Wrappers are defined for the DP3 Predict and Gaincal steps.

Some examples are reported in the Usage examples section.