auth0-swift-major-migration

Migrates Auth0.swift v2.x integrations to v3.x. Pass a target v3 tag as an argument (e.g. auth0-swift-major-migration 3.0.0-beta.2) to pin a specific version, or omit it to auto-resolve the latest v3 release. Detects the current version, fetches the new SDK's actual source to confirm signatures, audits which Auth0 APIs the project actually uses, and applies only the breaking changes that affect real call sites — nothing else. Builds until green, then summarises what changed.