RFE: Audio playback to continue with screen off

**Is your feature request related to a problem? Please describe.**
Yes. When I listen to articles with Wallabag for Android, the screen lock will eventually engage, making the current article the last one to play instead of continuing to play. This prevents me from listening to Wallabag for an extended period (e.g., when driving or going for a walk) without keeping the screen lock from going on. This can be a dangerous distraction when driving, so adding this feature would increase the safe use of the app as well. Pocket for Android had this feature, and it worked great, and it's one of the few things I miss after migrating to the most awesome Wallabag.

**Describe the solution you'd like**
The option to continue playback when the screen is locked.

**Describe alternatives you've considered**
I'm currently achieving this by preventing the screen from going to sleep, but that's not ideal or safe.

Thank you for considering this!