feat: expand auth0 management api client

[zdburrage]

Summary

Expands the Auth0 Management API client with the endpoints needed for upcoming SSO handoff, roles, and bulk export phases.

This includes:

• Connection reads: getConnections, getConnection
• Organization connection reads: getOrganizationConnections
• Role reads: getRoles, getMemberRoles
• Bulk user export plumbing: createUserExportJob, getJob, downloadJobLocation
• Auth0ApiError for catchable HTTP failures
• Missing read:connections_options helper for warning paths
• Auth0 Management API types
• README scope updates for connections, connection options, roles, and org member roles
• Generated dist updates

Impact

No CLI behavior changes in this branch. It is API plumbing for the next Auth0 SSO handoff and roles phases. Existing Auth0 export paths continue to use the same public command surface.

Validation

• npm run typecheck
• npm run lint
• npm run format:check
• npm test
• npm run build

[devin-ai-integration]

✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no potential bugs to report.

View in Devin Review to see 4 additional findings.