WorkOS AuthKit for React Router

Decision Tree

1. Fetch README (BLOCKING)
2. Detect router mode
3. Follow README for that mode
4. Verify with checklist below

Phase 1: Fetch SDK Documentation (BLOCKING)

STOP - Do not write any code until this completes.

WebFetch: https://raw.githubusercontent.com/workos/authkit-react-router/main/README.md

The README is the source of truth. If this skill conflicts with README, follow the README.