Support JWS jwk header in JWT Build API

[sberyozkin]

https://datatracker.ietf.org/doc/html/rfc7515#section-4.1.3

Starting with

Jwt.claim("a", "b").jws().jwk(evidencePublicKey).sign();

Should produce a jwk header, as an RSA or EC public key representation.

Probably

Jwt.sign("evidence", List.of(evidencePublicKey));

Should produce a claim evidence containing a single array with jwk.

Main motivation is to support testing DPoP use cases but also to support other prod and test cases as needed.

I'll do a release once this issue is resolved