Complete support for JOSE required algos according to IANA

[jaromil]

The IANA register of signature (alg field) and encryption (enc) field mandates the implementation of some algorithms that are easy to implement in Zenroom. We need to complete them, cover them by vector tests provided by each corresponding RFC and insert them in the new src/lua/crypto_routes.lua resolution mechanism to have them activated throughout all Zenroom signing and encryption code, whose integration is WIP.

Reference https://www.iana.org/assignments/jose/jose.xhtml

Relevant section:

having only required and recommended+ may be a good start.

Pending a refactoring of the encryption (AES) which is now incorrectly intertwined into the ECDH scenario.