Implement Cryptography API

[zedgell]

Description

Add Cryptography API to the GRPC client and created example

Issue reference

This PR will close #133

Checklist

• [x] Code compiles correctly
• [x] Created/updated tests
• [x] Extended the documentation

[mikeee]

@zedgell Amazing! I will block out some time today to review this!

[zedgell]

Just a small addition - will need to be added to the workflow manually: .github/workflows/validate-examples.yml

@mikeee It is added now.