refactor: streamline signer and verifiers, make them plugable.

[vkubiv]

No description provided.

[codecov-commenter]

Codecov Report

Attention: 74 lines in your changes are missing coverage. Please review.

Comparison is base (f415c5a) 85.18% compared to head (2680e3a) 87.73%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #28      +/-   ##
==========================================
+ Coverage   85.18%   87.73%   +2.54%     
==========================================
  Files          72       53      -19     
  Lines        8559     7925     -634     
==========================================
- Hits         7291     6953     -338     
+ Misses       1002      708     -294     
+ Partials      266      264       -2     

Files	Coverage Δ
crypto-ext/verifiers/ed25519/verifier.go	100.00% <100.00%> (ø)
dataintegrity/suite/ecdsa2019/ecdsa2019.go	90.68% <100.00%> (+0.17%)	⬆️
dataintegrity/verifier.go	89.88% <ø> (ø)
didconfig/verifier/didconfig.go	94.89% <100.00%> (ø)
sdjwt/holder/holder.go	97.91% <100.00%> (ø)
sdjwt/issuer/issuer.go	92.65% <100.00%> (ø)
sdjwt/verifier/verifier.go	95.47% <100.00%> (+1.56%)	⬆️
verifiable/bbs_selective_disclosure.go	71.06% <100.00%> (ø)
verifiable/common.go	82.47% <ø> (-0.86%)	⬇️
verifiable/credential_bbs.go	76.92% <100.00%> (-3.08%)	⬇️
... and 20 more

... and 2 files with indirect coverage changes

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[Moopli]

2 main things:

1. One typo that I think is a bug, at proof/jwtproofs/ps256/proof.go:33
2. Find&replace changed a lot of comments and strings that say things like sign, verify, signer, verifier, value; and that includes a lot of places that shouldn't change, I've tagged all I found.

Other than those, this looks good!