Update examples

* Change Tool @extends to properties
* Add module comment sub-headings
* Expand short example
Move content from docs.md into files

* Move content and examples from docs.md into respective files.
* Remove docs.md
Update sections titles and navigation

* Change Settings to Config
* Change Utilities to Tools
* Update list order in Foundation/index and navigation
Update Extends placement

* Remove Extends example from Tools
* Add Helpers use case
* Add Tools sub-headings