Converted doxygen style comments to reStructuredText style in the files
found in Cura/cura/Model directory recursively using the script
dox_2_rst.py (provided in the Uranium repo). Comments were manually
checked and changed if needed.
Note: dox_2rst.py struggles with decorated functions.
This sets up a few new classes, subclasses of ContainerNode.
This is intended to simplify the current structure in the QualityManager.
Contributes to issue CURA-6600.