Add "Star" to follow extensions or select as favorites

[slurpo]

Hi

I think a good idea for the Extensions Marketplace would be to have the option to mark extensions as favorites so I can stay updated on changes, but also keep track of which extensions I want to install in new instances of Visual Studio or simply mark them to install later (I know there’s a Roaming option in Visual Studio itself, but this would be at the Marketplace level so they’re associated with my user account).