one - to - one mapping of Auth0 userdata

[muhlemmer]

The current Auth0 migration tool currently transforms data:

Source (Auth0)	Destination (ZITADEL)
email	userName
name	firstName
name	lastName
--email-verified flag	isEmailVerified

I believe this was based on the data available in the export example docs. However, digging a little deeper, it seems it's possible to extract all fields from auth0 directly: https://auth0.com/docs/manage-users/user-accounts/user-profiles/user-profile-structure. Including fields currently not even considered, such as a metadata object.

Acceptance criteria

• [ ] Map all available export fields to available import fields
• [ ] Update the documentation with the command required to export those fields from Auth0