Feature/167437546/initial setup

[mi-xu]

This PR is to set up a new library responsible for creating JWTs that adhere to the W3C Verifiable Credentials and Presentation data models.

At the moment, there are 2 functions: createVerifiableCredential() and createPresentation(). Their primary responsibility is to enforce the specs at compile-time through type definitions and runtime validation of the input attributes.

Other functionality to be added may include:

• verify vcs and presentations
• builder patterns to construct the data models (alternative to passing in the objects directly)
• objects to manipulate and query information from a vc or presentation
• cli commands for performing creating and verifying vcs and presentations
• tools for working with claim schemas/semantics?
• functions to convert to/from json[-ld] vcs?

[mirceanis]

Looks good to me

[awoie]

Should we provide the ability pass the VC @context?

Update: just recognized the feature is there, so the PR is fine by me

[awoie]

looks good

[mi-xu]

Set up the initial project

• typescript

• linting and formatting

• microbundle for builds

• jest for testing

• function to create a Verifiable Credential JWT with required fields

• function to create a Presentation JWT with required fields

The first iteration of these functions requires the user to supply the entire JWT payload data structure as an input (with type completion). Future iterations will allow also provide runtime validation of the attributes, and improved developer experience by supporting construction through a builder pattern.

Testing

• added snapshot tests of creating valid JWTs
• verify that the functionality works correctly in the mouro-client-cli