[Task] Add support for VC Data Model 2.0

[eike-hass]

Description

Add support for the upcoming VC Data Model v2.0 in a way that allows multiple data models to coexist.

Motivation

Stay compatible with the latest recommendations in the identity ecosystem and create the capabilities needed to support multiple models/encodings in parallel.

Resources

https://www.w3.org/TR/vc-data-model-2.0/

To-do list

Create a task-specific to-do list. Please link PRs that match the TODO list item behind the item after it has been submitted.

• Multi Model Design
• Rust implementation
• Wasm implementation

Change checklist

Add an x to the boxes that are relevant to your changes, and delete any items that are not.

• The feature or fix is implemented in Rust and across all bindings whereas possible.
• The feature or fix has sufficient testing coverage
• All tests and examples build and run locally as expected
• Every piece of code has been document according to the documentation guidelines.
• If conceptual documentation (mdbook) and examples highlighting the feature exist, they are properly updated.
• If the feature is not currently documented, a documentation task Issue has been opened to address this.

Tasks

Beta Give feedback

1. Create Design Document, Multi DataModel/Encoding Design #1294
   +0
   
2. Proof of Concept for implementing the current specifications and structures following the new concept #1307
   +0
   
3. Actually implement VC Data Model 2.0
4. Fully integrate new structure in library
5. Demo internal proof using DataIntegerityProof``, potentially using eddsa-jcs-2022`