todo: Make nonce not require Clone anymore

[joshua-mo-143]

Nonces being able to be cloned means that implicitly speaking, we are re-using the encryption strategy which should be urgently fixed: https://docs.rs/ring/latest/ring/aead/struct.Nonce.html

Note that this also means EncryptedSecret must now not also require Clone and instead use lifetimes.

STATUS: Done on refactor branch, just needs a PR

[joshua-mo-143]

Closed because #10 was merged which fixes this issue