feat: allow Secp256r1 key type

[martines3000]

What is being changed

Allows Secp256r1 key type for verifiable credential and verifiable presentation creation.

Quality

Check all that apply:

• I want these changes to be integrated
• I successfully ran pnpm i, pnpm build, pnpm test, pnpm test:browser locally.
• I allow my PR to be updated by the reviewers (to speed up the review process).
• I added unit tests.
• I added integration tests.
• I did not add automated tests because _________, and I am aware that a PR without tests will likely get rejected.

[codecov]

Codecov Report

Patch coverage: 75.00% and project coverage change: -0.02 ⚠️

Comparison is base (e2d7966) 84.52% compared to head (55e7e55) 84.50%.

Additional details and impacted files

@@            Coverage Diff             @@
##             next    #1192      +/-   ##
==========================================
- Coverage   84.52%   84.50%   -0.02%     
==========================================
  Files         158      158              
  Lines       16615    16620       +5     
  Branches     1819     1821       +2     
==========================================
+ Hits        14043    14044       +1     
- Misses       2572     2576       +4     

Impacted Files	Coverage Δ
packages/credential-w3c/src/action-handler.ts	81.55% <75.00%> (-0.61%)	⬇️

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[mirceanis]

Looks great, thanks for adding this!