Add docver schema with DocumentStatus schema type

[nedgar]

WIP on extending the verifier server to support different examples of various claim schemas / types.

Just FYI @Chengxuan @jimthematrix. Please LMK if you're working on something similar or have any suggestions.

Next step: pass through example= and other query args from landing page to sign-in endpoint.

[nedgar]

@jimthematrix @Chengxuan I ended up adding two refactorings:

• factor the KYC and Document Verification examples into their own source files, under /examples
• split the UI into two pages:
  1. the landing page, which now has two buttons
  2. the QR page; which takes an ?example= query arg, e.g. http://localhost:8080/qr.html?example=docver_passport

Please have a look and let me know what you think of this approach. I was able to test it end-to-end using the docver example.

I think we should allow the examples to have their own description / reason and show that in the QR page, and perhaps unique challenge IDs too. Do we need both the session ID and challenge IDs?

[nedgar]

We could also add an API endpoint to list the available examples, rather than hardcoding knowledge in the UI.

[nedgar]

Here's what the landing page looks like:

[jimthematrix]

sorry @nedgar , didn't notice your PR before making the refactoring to have the v1 and v2 top-level folders. Hope the conflict resolution isn't too bad.

[nedgar]

@jimthematrix No worries. I'll close this for now.