Users: Auth0 User management and tools

User interface in TPEN-Users repository should be set up to fulfill two purposes:

1. Any user can see/verify their own account information on Auth0. A public user (anyone who signs up) can see their own profile like in Gallery of Glosses:
2. Admin users (roles includes `tpen_user_admin`) see a list of current users (roles includes `tpen_user_public`)

## Notes

- The manipulation of roles is out of scope for this ticket - the focus is on the public user info reveal.
- It is reasonable to comment out imports for unused interfaces to avoid errors in running, but let's avoid wholesale deleting of forked modules/interfaces at this stage unless they are directly problematic.
- This is _only_ for the Auth0 account data. Users will manage their public and private information in an Interface in a separate application through annotation and API services.
- Other user actions, like requesting a new password or updating username are out of scope.