feat(actions): improve actions behavior and add support for exec

[alexpasmantier]

📺 PR Description

This improves support for fork and adds the logic for the exec feature.

I'm dropping the OutputMode logic for now as it doesn't seem that useful and kind of gets in the way right now. We might add that back later on.

Checklist

• my commits and PR title follow the conventional commits format
• if this is a new feature, I have added tests to consolidate the feature and prevent regressions
• if this is a bug fix, I have added a test that reproduces the bug (if applicable)
• I have added a reasonable amount of documentation to the code where appropriate