E2E example usingt recursive mocked passport proof

[mitschabaude]

Right now we have a nice e2e example using a simple credential.

Both for the wallet integration, and for coordinating with zkpassport work, it would be nice to add another e2e example using a mock passport proof. This should demonstrate:

• How to structure a zkprogram such that it can be used as recursive credential
• Parsing a string - the passport MRZ - into its constituent pieces inside a circuit