* website: add back unlinked pages to match previous state
* website: add unlinked content check
* website: add hidden nav-data to unlinked content check
* website: migrate to new nav-data format
* website: clean up unused intro content
* website: remove deprecated sidebar_title from frontmatter
* website: add react-content to fix global style import issue
* Adds a new react component `ConfigEntryReference` that allows us to
document config entries for both HCL and Kubernetes CRDs.
* Rewrites config entry docs to use new component
* Add CRD examples alongside HCL examples
* Removes examples from Kube CRD doc because the examples are now in the
main CRD docs
Zachary Shilton