Co-authored-by: Alberto Blanco <alberto@basenet.nl>

* 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)

** For iOS only

* V2: Peek and pop

* Add event when preview is dismissed in non commit mode

* tslint

* Refactor playground. Document preview api

* Added width prop

* Implement hybrid push/preview button

* Fixing small linting errors

This reverts commit a9b9d8379c.

Test Jenkins

* Rename to onChildWillAppear

* update roadmap

The following  https://github.com/wix/react-native-navigation/pull/3006 implemented this functionality

Add downloads per week

for triggering build

The tables had some issues: the header for contributor column wasn't there (with the contributors still in place). I've re-added the headers where needed.

Added new line to trigger build