feat: support for policy v2 and v1 deprecation

[KunalSin9h]

fixes: #134

tested:

• Default policy v1: Vet action test 1
• Input policy v2: vet action test 2

After this, the next steps will be to remove policy arg entirely, which can be done slowly.

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[safedep]

SafeDep Report Summary

No dependency changes detected. Nothing to scan.

_{This report is generated by SafeDep Github App}

[devin-ai-integration]

✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no potential bugs to report.

View in Devin Review to see 3 additional findings.

[KunalSin9h]

@abhisek resolved.

[abhisek]

@abhisek resolved.

@KunalSin9h Linters are still failing.

[KunalSin9h]

@abhisek fixed linter.