Human readable colored view

[mauvilsa]

Here is a proposed implementation for #529 "2. Similar to dwdiff -c, where the entire json is shown mostly in white font, but in places where there are differences, show deletions in red and additions in green."

I am not familiar with the deepdiff codebase, I wouldn't know how or where to best integrate this feature. It was an LLM who proposed where. Please comment whether it should be done differently.

If the jsons being compared are very big, and there are only a few differences, this view is not great, because there is no fast way to know where the differences are. That is why #529 1. would still make sense. But that one is more complex and could be a future improvement. This one is already useful for several use cases.