More features for controlling Screentime#1243

• Introduce an option to reflect daily on your screentime as a way of controlling it
• Features for controlling screentime by blocking apps (like a more extensive version of stoic shield)

I think this approach of combining reflection and blocking - will help reduce screen time for those who have an issue with managing it, which frankly, is a lot of people now

Plus high screentime is associated with problems in mental health, even physical health and sleep, which are all areas that journalling addresses so this feature would be pretty relevant for the app

(Also this feature would be optional obviously)