As a Gateway API user, I'd like to know some more about Gateway API features not present in Route.  We did this in dev preview, now make sure it continues to work in Tech Preview with any updates to Istio, etc.

• More powerful path-based routing.
• Header-based routing

Deliverable is documentation, in collaboration with the Docs team.

The documentation can draw from the examples in our Dev Preview blog post: https://cloud.redhat.com/blog/introducing-gateway-api-with-openshift-networking-developer-preview