Grouped habits with optional accumulated tracking

[Meloncolonic]

It would be great to have an overarching habit/category that also acts a roll-up of the sub-habits there-in (e.g. 'exercise' would be the parent of 'run', 'bike', 'weights', etc.).

Where this is different from similar suggestions, is that in addition to the organisational benefits, I suggest allowing the user to configure what constitutes completion for the parent and track the rolled-up habit.

1. 'Complete all' would mark the parent complete if all sub-habit targets are met
2. 'Complete any' would mark the parent complete if any of the sub-habits are met
3. 'Complete x' would mark the parent complete if a target number of sub-habits are met
4. 'Manual' (hopefully obvious)
5. 'None' would allow the parent habit to operate as an organisational label only

I currently tracking a number of physical and mental health habits and being able to group them and automatically track whether I did all/any of them over time would be a great feature.