chore(proofs): reorganise vc/data-integrity folder structure

[rmlearney-digicatapult]

data-integrity mostly contains code for linked-data-proofs. With the release of data integrity 1.0 it would be semantically confusing to populate the existing data-integrity folder structure with new code alongside the linked data work.

This prepares the vc/ folder layout for future work on the data integrity 1.0 credential handling service

No code changes, only movement and changes to imports.

New structure:

vc/
  jsonld/ (contains document loader and contexts)
  jwt-vc/
  linked-data-proofs/
    __tests__/
    adapters/
    models/
    proof-ops/
      types/
    proof-purposes/
    signature-suites/
      ed25519/
  models/
  repository/
  sd-jwt-vc/

this allows for data-integrity-v1 within vc/

[changeset-bot]

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Latest commit: a55dd87

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