Add support for Linked Data Proofs and JSON-LD VCs

[TimoGlastra]

Context

See issue in Aries Framework JavaScript: https://github.com/hyperledger/aries-framework-javascript/issues/355

• https://github.com/Sphereon-Opensource/rn-vc-js
• https://github.com/digitalbazaar/vc-js/tree/rn

Todo

• [x] https://github.com/hyperledger/aries-framework-javascript/issues/355
• [ ] Securely store VC in storage after receiving from issuer