* Use CodeTabs for examples in multiple formats.
* Ensure correct language on code fences.
* Use CodeBlockConfig for examples with filenames, or which need
highlighted content.
* docs: Add info on using cloud auto-join with Network Segments
Resolves hashicorp/go-discover#57
* Add note about joining network segments
Specifically call out that agents can be configured to join a network
segment by either specifying the Serf LAN port in the join address,
changing the agent's default Serf LAN port by configuring
`ports.serf_lan`, or specifying the port in the `-serf-lan-port`
command line flag.
Resolves#9972
* 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
Natalie Smith