Add missing explainers to Explainers enum

[adamwawrzynski]

Description

This PR adds missing explainer classes to Explainers enum class to enable thier usage in context manager AutoXaiExplainer.

How Has This Been Tested?

Please describe the tests that you ran to verify your changes.

• Test A

Checklist:

• I have updated all related pyproject.toml files.
• I have updated lock files.
• I have set an Assignee and Reviewers.
• I have labeled the PR correctly.
• I have performed a self-review of my own code.
• I have covered my code and changes with unit tests.
• I have annotated types as extensively as possible.
• I have commented my code, particularly in hard-to-understand areas.
• I have made corresponding changes to the documentation.
• My changes generate no new warnings.
• All code references and dependencies will work.