Automatic icon on App download page

Description of the feature request

In lots of cases, app icons is selected depending on some factors (Targets, Schemes, build configurationsā€¦), but the app icon on the download page for bitrise, is always the same you uploaded on the app settings.

Use case / for what or how I would use it

So, the feature would be to add a checkbox on ā€œupload to bitriseā€ step on the workflow to allow to extract the icon from the bundle uploaded.