Trove as subscription

[UncleGoogle]

Use newly released Galaxy feature for subscripitons

todo:

• [x] implement plugin method
• [x] remove from library resolver
• [x] remove Trove tags
• [x] rm from gui
• [x] add tests
• [x] fix install_game and other method that rely on owned games cache
• [x] optimize by adding to persistent cache
• [x] update changelog

[UncleGoogle]

bettercodehub does not pass because it has a bug for asyn generators