This commit adds example JSON configs for several config entry
resources were missing examples in this language.
The examples have been updated to use the new CodeTabs resource
instead of the Tab component.
* 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
Blake Covarrubias
Zachary Shilton
Luke Kysow