* Update ORT Mobile documentation for both the pre-built package and custom build usage
Add info on pre-built package and CoreML EP
Refer to operator kernels and contrib ops documentation in github so we can point to the version specific content
Tweak some aspects like not specifying nav_order in places (items sort alphabetically by default)
* merge previous unmerged ios doc updates
* Address PR comments
* Minor tweaks
* Address PR comments
Co-authored-by: Guoyu Wang <wanggy@outlook.com>
* Test re-using page layout from current ONNX Runtime website for docs
* Add content for documentation on website
* Fixed most broken links
* Copy just-the-docs theme sources into repo
* Remove local theme files as this did not work with GitHub
* Remove nojekyll file
* Move image assets into single location
* Add Contents to markdown files and ensure only one h1
* Update after review
* Fix img links
* Add trailing slash to main nav links
* Fix broken links on main docs page
* Re-fix broken links on main docs page
* Fix broken links #3
* Fix broken links #4
* Fix broken links #5
* Fix broken links #6
* Fix paths to global assets
* Add updates since fork
* Update custom op docs
* Fix link
