Add OSSF Scorecard GitHub Action

[jmeridth]

Add the OSSF Scorecard GitHub Action to this repo.

Why?

Allows us to detect supply chain security for this GitHub Action.

Actions

• setup GitHub Action
• add badge to README once wired-up

[github-actions]

This issue is stale because it has been open 21 days with no activity. Remove stale label or comment or this will be closed in 14 days.

[jmeridth]

Closed by #62