CDS Views are now in API Business Hub!
Go to api.sap.com
On the bottom right corner of the tab "SAP S/4HANA Cloud" click on "View more"
You will find many CDS views summarised for each LoB
For instance if you want to search for a CDS view regarding the workforce person, go to "SAP S/4HANA Cloud for Human Resources" and search for "workforce"
Click on Workforce Person Details. It will redirect you to a S/4HANA Cloud trial system. If you are doing this for the first time you need to register first. After registration you will be able to access the trial system and a detailed documentation of your CDS view will be shown.
Let me know your feedback on this new feature :-)