Enhancement Description

• One-line enhancement description: Enhance Package signing and verification using the sigstore bundle format and Trusted Roots to enable offline verification for multiple signing strategies.
• Zarf Enhancement Proposal:
• Primary contact (assignee): @brandtkeller
• Enhancement target (which target equals to which milestone/version):
  • Alpha release target (x.y):
  • Beta release target (x.y):
  • Stable release target (x.y):
• Alpha
  • ZEP (zarf-dev/proposals) update PR(s):
  • Code/Docs (zarf-dev/zarf) update PR(s):

Please keep this description up to date. This will help efficiently track the evolution of the enhancement.