Generate verification manifest file to reference diff, actual, expected images for consumption (initially for test report inclusion)

[geoff-powell]

Currently, we use delta image file names to parse things like test name, package, class name, etc. This is very brittle and has lead to a few issues in our filename parsing logic. This improvement would generate a json (or txt file) representation of paparazzi's verification that can be consumed later. (first iteration would be including diffs in test reports)

[TWiStErRob]

Implementing this would solve/enable

• If I have a bunch of UI modules, some that apply the Paparazzi plugin and some don't, is there a built-in way to aggregate all the paparazzi reports into one? Or would I have to apply the Paparazzi plugin to my root/app module to do so? #1710