Add actions scan via Zizmor

[tizianocitro]

Is your feature request related to a problem? Please describe.

I want to scan actions for security vulnerabilities.

Describe the solution you would like

Scan actions for security vulnerabilities.

Describe alternatives you've considered

NA.

Additional context

• Zizmor GitHub: https://github.com/zizmorcore/zizmor/.
• Zizmor integration with actions: https://docs.zizmor.sh/integrations/.
• Flask usage: https://github.com/pallets/flask/blob/main/.github/workflows/zizmor.yaml.