feat: add session actor and branding theme identifiers

[fern-api]

Changes

This updates the SDK surface for the v6 line.

Added

• Session actor support for delegated sessions: a new actor field on the session response types (SessionResponseContent, GetSessionResponseContent), backed by the new SessionActorMetadata and SessionActorClaimValue types.
• Branding theme identifiers: a new identifiers field on GetBrandingThemeResponseContent, backed by BrandingThemeIdentifiers and its supporting enums (login display, phone display formatting and masking).

Changed (breaking)

• Field names across the type models were normalized to snake_case, dropping the previous api_name overrides. For example, NetworkAclMatch now exposes auth0_managed, ipv4_cidrs, ipv6_cidrs, ja3_fingerprints, ja4_fingerprints, connecting_ipv4_cidrs, and connecting_ipv6_cidrs. Many type class and file names were renamed accordingly (for example ConnectionOptionsAuth0Oidc, ConnectionSha1Thumbprint).

References

N/A

Testing

Wire tests were updated to match the renamed types and the new fields.

• This change adds unit test coverage
• This change adds integration test coverage
• This change has been tested on the latest version of Ruby

Checklist

• I have read the Auth0 general contribution guidelines
• I have read the Auth0 Code of Conduct
• All existing and new tests complete without errors
• Rubocop passes on all added/modified files
• All active GitHub checks have passed