feat(anoncreds): add AnonCreds format services

[genaris]

Add Credential and Proof format services according to Aries RFC 0771.

Essentially the same as Legacy Indy counterparts but using the new identifiers, using entropy instead of prover_did for Credential Request and not restricting identifiers to legacy Indy format, so any AnonCreds method can be used with them.

[codecov-commenter]

Codecov Report

Merging #1385 (b9e9aed) into main (c17013c) will decrease coverage by 1.79%.
The diff coverage is 5.50%.

@@            Coverage Diff             @@
##             main    #1385      +/-   ##
==========================================
- Coverage   87.20%   85.42%   -1.79%     
==========================================
  Files         780      782       +2     
  Lines       18749    19167     +418     
  Branches     3042     3116      +74     
==========================================
+ Hits        16351    16374      +23     
- Misses       2391     2786     +395     
  Partials        7        7              

Impacted Files	Coverage Δ
packages/anoncreds/src/models/exchange.ts	100.00% <ø> (ø)
...oncreds/src/formats/AnonCredsProofFormatService.ts	3.76% <3.76%> (ø)
...ds/src/formats/AnonCredsCredentialFormatService.ts	6.77% <6.77%> (ø)
packages/anoncreds/src/formats/index.ts	100.00% <100.00%> (ø)

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[TimoGlastra]

Nice, great work!!!

Would be good if we could add one e2e test using the public api leveraging the anoncreds formats, but that can be added in a follow up pr as well!