Remove incorrect sidecar port range on docs for built-in proxy.
Updates the bind_port/port fields on the built-in proxy and sidecar
service registration pages to link to the `sidecar_min_port` and
`sidecar_max_port` configuration options for the defined port range.
Fixes#12253
* Use CodeTabs for examples in multiple formats.
* Ensure correct language on code fences.
* Use CodeBlockConfig for examples with filenames, or which need
highlighted content.
* 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
