[PostHog] Add WorkOS as a managed data warehouse source

### Feature request ## Is your feature request related to a problem? There's currently no managed connector for WorkOs in PostHog's data warehouse. WorkOS is widely used to add enterprise-grade authentication and user management to SaaS products — including SSO, Directory Sync (SCIM), Audit Logs, and Magic Auth. Teams that use WorkOS have no easy way to correlate their identity and auth data (e.g. who logged in, which orgs are active, directory changes, audit events) with product usage data in PostHog without manually exporting and uploading files. ## Describe the solution you'd like Add WorkOS as a managed source in the PostHog data warehouse, similar to existing connectors like Stripe, Clerk, and Hubspot. It should allow users to provide a WorkOS API key and have PostHog automatically sync relevant WorkOS resources into queryable tables. Suggested schemas to sync: users, organizations, organization_memberships, invitations ## Describe alternatives you've considered - Using a third