Description

• fix: Add missing testcases for ISIS in example folder
• fix: Add missing testcases for anta.tests.configuration.VerifyRunningConfigLines in example folder
• doc: Update example README with missing files

Fixes #743

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have run pre-commit for code linting and typing (pre-commit run)
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes (tox -e testenv)