Introduce zarf package preview to provide a clean way to view templated packages before create

[AustinAbro321]

Enhancement Description

• One-line enhancement description (can be used as a release note): Introduce zarf package preview to provide a clean way to view templated packages before create
• Zarf Enhancement Proposal:
• Primary contact (assignee): @AustinAbro321
• 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.