Path parameters, query parameters, and request body parameters are now shown in
separate sections rather than combined into one general parameters section.
This makes it much easier to understand quickly where a parameter should be
provided.
* 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