Support locating artwork for each game #102
Description
Do the maintainers consider it in scope to be able to fetch the artwork (logo.png, library_hero.jpg etc) found under <STEAM_DIR>/appcache/librarycache/<GAME_ID>? If so, I'd be willing to create a PR (I intend to add it anyways for a personal project, but it would be great if other people could use it too).
Analogously to find_app I'd imagine that something like find_app_artwork(u32) -> Result<Artwork> would work as an API (names can be improved).