* add sdk links to docs
* Update docs/content/doc/advanced/api-usage.en-us.md
Co-authored-by: John Olheiser <john.olheiser@gmail.com>
Co-authored-by: Markus <git+markus@obermui.de>
Co-authored-by: John Olheiser <john.olheiser@gmail.com>
* add api user guides in doc
* update user-guides api page
* fix typo: user guides -> user guide
* move api-usage page under advanced category
* flesh out API usage docs
* Build on work by @tungsheng
* Address issues raised in #4037