Refactor last activation banner logic.

[rabbah]

Description

Refactors logic which emits intra activation banners when separating multiple activation results or logs. This log is used with activation get --last --result|--logs and activation result --last [--limit N]. A --quiet flag will suppress the banner.

To use this banner logic with activation logs, a patch is needed in AIO https://github.com/adobe/aio-lib-runtime/issues/27.

Related Issue

See #23.

Motivation and Context

How Has This Been Tested?

Screenshots (if appropriate):

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• [ ] I have signed the Adobe Open Source CLA.
• [ ] My code follows the code style of this project.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [ ] I have read the CONTRIBUTING document.
• [ ] I have added tests to cover my changes.
• [ ] All new and existing tests passed.

[rabbah]

Happy to trust Rodric to write reasonable code.

with equally reasonable test 😅 - for some definition of reasonable.