Co-authored-by: Guy Carmeli <guyca@users.noreply.github.com>

What's changed:
- Added a new side bar, `Third party integration` and to that added `React Context API` and `MobX` documentation. 
- Added a limitation of using React Context API with RNN so people are informed of such caveat.
- Informed the readers that if they wish to trigger re-renders across all screens, they need to use the alternatives such as MobX or Redux.

* Update installing doc

* Rename style articles

* add docs prefix to getting started articles

* Rename all the things. Consistent id format

* Split docs and api

* Fix links

Co-authored-by: Guy Carmeli <guyc@wix.com>

* Completely rewritten the docs from scratch
* More coherent separation between guides and API documentation
* Switched to Docusaurus 2 since Docsify is deprecated
* More code samples
* Images and animated gifs were added where appropriate improve clarity (more will be added in the future)