* 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
- moved and renamed files/folders based on new structure
- updated docs navigation based on new structure
- moved CLI to top nav (created commands.jsx and commands-navigation.js)
- updated and added redirects
- updating to be consistent with standalone categories
- changing "overview" link in top nav to lead to where intro was moved (docs/intro)
- adding redirects for intro content
- deleting old intro folders
- format all data/navigation files
- deleting old commands folder
- reverting changes to glossary page
- adjust intro navigation for removal of 'vs' paths
- add helm page redirect
- fix more redirects
- add a missing redirect
- fix broken anchor links and formatting mistakes
- deleted duplicate section, added redirect, changed link
- removed duplicate glossary page