Skip or error when trying to register an archived repository

[rdimitrov]

Summary

Currently if we try to register an archived repository we error out because GitHub doesn't allow us to create a webhook in it.

The following PR:

• Skips listing archived repositories so the user cannot choose them.
• Added a dedicated error type/message in case the user tries to register one explicitly via the CLI
• Fixed an issue where if we failed to register any repositories, we still printed a table in the CLI.

Fixes #1428

Change Type

Mark the type of change your PR introduces:

• Bug fix (resolves an issue without affecting existing features)
• Feature (adds new functionality without breaking changes)
• Breaking change (may impact existing functionalities or require documentation updates)
• Documentation (updates or additions to documentation)
• Refactoring or test improvements (no bug fixes or new functionality)

Testing

Tested locally with an archived repository

Review Checklist:

• Reviewed my own code for quality and clarity.
• Added comments to complex or tricky code sections.
• Updated any affected documentation.
• Included tests that validate the fix or feature.
• Checked that related changes are merged.

[coveralls]

coverage: 48.148% (-0.01%) from 48.162%
when pulling b5881b1 on archived
into 38bf147 on main.