What is the best practices for PowerBI version control

Hi, 

What version control are available for PowerBI and what is the best practices for version control?

What is the best practices for Application Lifecycle Management (Dev -> UAT -> Prod)?

What is the best way to control the deployment PowerBI in a large/enterprise organisation so that we don't lost track on the usage and deployment?

Is there any limit on number or workspace own by a person?

Thank you in advance