Expected behavior

No references to porch in the kpt documentation

Actual behavior

There are still some references. There should be a single high-level reference to porch and point to the Nephio documentation, but no documentation describing the porch concepts in the kpt docs

Information

https://kpt.dev/guides/
https://kpt.dev/book/08-package-orchestration/

Anything relevant should be moved to porch

Steps to reproduce the behavior