esignet v0

[taylordowns2000]

Summary

Adds support for eSignet getUserInfo

Please disclose how you've used AI in this work (it's cool, we just want to
know!):

• I have used Claude Code
• I have used another model
• I have not used AI

You can read more details in our
Responsible AI Policy

Review Checklist

Before merging, the reviewer should check the following items:

• Does the PR do what it claims to do?
• If this is a new adaptor, added the adaptor on marketing website ?
• If this PR includes breaking changes, do we need to update any jobs in
  production? Is it safe to release?
• Are there any unit tests?
• Is there a changeset associated with this PR? Should there be? Note that
  dev only changes don't need a changeset.
• Have you ticked a box under AI Usage?

[josephjclark]

@taylordowns2000 is this still alive? Did you want it releasing?

[taylordowns2000]

no, i'd prefer it left in draft for now if that's OK. (also happy to close and re-open later from the branch if that's better.)