* break up large H3 in concepts/state docs
* move service architecture under backend heading
* reduce heading depth to place more items on sidebar nav
* Apply suggestions from code review
* merge logout with login, self-hosted service with service backend
* update links to state
Co-authored-by: susan evans <susan.ra.evans@gmail.com>
* Add some initial structure for what is pages
* Add some dots
* Refinements to what is pages
* Make the linter happy
* Add why is python so popular topic page
* Add infrastrucutre as code internal links
* Add infrastructure as software internal links
* Fix link formatting
