Add --after-date for github subcommand

[dwisiswant0]

Please review the Community Note before submitting

Description

I've noticed that using the github subcommand without providing a --token only checks public repos. This works well for me because I'm specifically searching for leaked secrets in public repos. However, I want to automate this process using GitHub Actions, scheduling scans every week or so. The issue is, if I do this, I'll end up with the same results each time, which just creates unnecessary noise. Plus, using --since-commit isn't achievable by design.

Preferred Solution

I suggest adding support for --after-date to scan for leaked secrets in commits made after a specified date, making it easier to integrate into CI/CD pipelines. This way, I can save the date of the last scan and use it for the next one.

Additional Context

Implementing this feature would simplify the CI/CD setup and ensure more effective scanning by avoiding redundant results.

References