new: added run_id to reports and to the ctx object

[cryptaliagy]

Closes #38

Added run IDs to Quilla to better group and uniquely identify different runs. This is useful for storing all the report summaries to be able to uniquely identify them, and will be even more useful once we start using storage plugins for the VisualParity validation, since then different treatment images can be grouped up by run ID.

Since this is adding a new CLI flag, I also took the time to do a few quality of life changes to the parser:

• Categorized different parsing options in argument groups to group them more logically
• Added --indent to specify the indent level of the pretty-printed output
• Changed the usage string to not display all of the options since there are so many of them

[yucui-avengers]

Any plan to pass in run id in VP plugin definition?

[cryptaliagy]

Any plan to pass in run id in VP plugin definition?

It’s included in the Context object which the VP plugins have access to. This way, it’s something future plug-in developers can use, but it doesn’t instruct them to: they can decide on their own storage mechanism for images.