Enhance KnownPublishError visualisation

[MustafaJafar]

Is there an existing issue for this?

• I have searched the existing issues.

Please describe the feature you have in mind and explain what the current shortcomings are?

Enhance KnownPublishError to support changing the error label and message.

Current State	My suggestion

How would you imagine the implementation of the feature?

I made a draft PR for it #373 to experiment the idea where I was able to reproduce the screenshots above.

Are there any labels you wish to add?

• I have added the relevant labels to the enhancement request.

Describe alternatives you've considered:

Adding a Generic PublishError that works in a similar fashion to PublishValidationError which is a better user friendly way to raise and show errors from pyblish plugins like extractors or even from lib.py files.

It would like this (I hacked the code to be able to produce this screenshot)
In screenshot my code failed during extraction.

Additional context:

No response