Add metadata directory for app stores
Please add a metadata directory for app stores such as F-Droid and Google Play to automatically find metadata, screenshots and feature graphic.
For example in the Fastlane format, see https://github.com/y20k/transistor/tree/master/metadata/en-US
The phoneScreenshots can use the images seen https://play.google.com/store/apps/details?id=org.linphone
For feature graphic, I would like to suggest this PNG https://www.linphone.org/sites/all/themes/simple/images/footermobile.png that needs to be cropped to 1024 x 500 pixels.
If desired, I can make a merge request.