Auth Flow page tells local developers to disable NebariApp, contradicting dev/Makefile #42

docs/site/src/content/docs/auth-flow.md:384-386 (and the docs/auth-flow.md mirror) says: "The OIDC flow requires Keycloak and Envoy Gateway. When developing locally with kind, set nebariapp.enabled=false and test without auth."

The template's kind setup provides both. dev/Makefile:3-5 installs Envoy Gateway, cert-manager, Keycloak and the operator "so all examples deploy with NebariApp enabled", and make up-fastapi (dev/Makefile:167-178) deploys with nebariapp.enabled=true and auth.enabled=true and prints the Keycloak login. README.md:486-490 and docs/site/src/content/docs/concepts.md:144-155 agree with the Makefile.

Fix

Replace the limitation with a pointer to make up-fastapi and the Keycloak test credentials.

Verified against this repo at 4e50cd0, nebari-operator v0.1.1 (same commit as operator main), and NIC v0.14.0.