Create a Getting Started Guide for the CDK

#### Documentation Feedback

The Angular Material Getting Started Guide is being re-written in https://github.com/angular/components/issues/16426.

It seems like a separate "Getting Started with the CDK" guide would be useful as well. It should primarily be focused on library developers and not depend upon Angular Material.

We have a number of projects that use the CDK that we could link to in addition to some useful videos for getting started.

Libraries using the CDK
- https://akveo.github.io/nebular/
- https://github.com/ng-lightning/ng-lightning
- https://github.com/NG-ZORRO/ng-zorro-antd
- https://github.com/primefaces/primeng
- https://github.com/Teradata/covalent
- https://github.com/positive-js/mosaic
- https://github.com/TemainfoSoftware/truly-ui
- https://barista.dynatrace.com/

CDK Videos
- https://www.youtube.com/watch?v=kYDLlfpTLEA
- https://www.youtube.com/watch?v=v__RuD9RX3I
- https://www.youtube.com/watch?v=4EXQKP-Sihw
- https://www.youtube.com/watch?v=ngyEpcwkLW0
- https://www.youtube.com/watch?v=b04UeKOcqCE
- https://www.youtube.com/watch?v=oz6qbOtEgNw
- https://www.youtube.com/watch?v=ejh_UVci9FA
- https://www.youtube.com/watch?v=ByK3t2-EbF0
- https://www.youtube.com/watch?v=aOPUvyrr3y4
- https://www.youtube.com/playlist?list=PLQpZdy2HZ5BQ3WF3Fa7HFgvMwxm7Ujr0h

**Affected documentation page:** Insert a link to the affected page on material.angular.io
https://material.angular.io/guides

Here's a [related Angular Blog post](https://blog.angular.io/angular-5-1-more-now-available-27d372f5eb4e) about the CDK.

Commencez par la page des guides à l’adresse material.angular.io/guides et examinez le rewrite issue associé d’Angular Material, les CDK-using libraries liées et les vidéos. Créez un guide autonome Getting Started with the CDK destiné aux développeurs de bibliothèques, qui ne dépende pas d’Angular Material, intègre des liens utiles et soit lié depuis la page des guides.

Rédigé par le modèle d'indexation à partir du texte de l'issue.