Feature: Enable support for validating, but not failing checks

[primetheus]

In some cases, users may want to validate linked user stories if one is found, but not require the user story in the PR. This would require a few options:

1. Check the title, body and commit messages for user stories
2. Lookup and link any found user stories
3. Do not fail when user stories are missing
4. Fail when identified user stories are invalid

[github-actions]

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[github-actions]

This issue has been automatically marked as stale because it has not had recent activity.
It will be closed in 14 days if no further activity occurs.
Thank you for your contributions.

If you think this issue should stay open, please remove the O: stale 🤖 label or comment on the issue.

[ineffyble]

+1