Operation request: EdDSA Key Pair Generation

## Summary
Generate an EdDSA (Ed25519/Ed448) private key and a corresponding public key
(similar to RSA)

### Example Input
nothing

### Example Output
EdDSA Private and Public Key as PEM

Start by locating the existing RSA key-generation operation mentioned in the issue and its associated tests or entry point. Add equivalent Ed25519 and Ed448 private and public key generation, with PEM output, and verify both key pairs through the relevant tests.

Written by the indexing model from the issue text.