feature: Live Activity

[bastiaanv]

This PR is an initial/basic version of this Live Activity, without any feature which are spoken of in the Zulipchat.

Look & Feel:

Lock Screen (all iPhone's):

History only	History and predictive line	Live activity stale (8h limit i.e.)

Dynamic Island (iPhone 14 pro max and higher):

Screenshots are from a iPhone 15 pro max simulator

Dynamic Island minimal	Dynamic Island expanded

Settings

Can be found at: Settings -> Alert management -> Live Activity

Root settings	Bottom row settings	Available datapoints for bottom row

Things to know:

• The bottom row has a max of 4 items, but less items can be configured for small screen sizes (like the iPhone 13 mini)
• The bottom row can be configured to the user's wishes. Swap items around, different order etc. The default is: CurrentBG, IOB, COB, UpdatedAt (like in the screenshots)
• The following events trigger a re-render of the Live Activity:
  • LoopDataManager -> GlucoseStore.glucoseSamplesDidChange
  • LoopDataManager -> CarbStore.carbEntriesDidChange
  • LoopDataManager -> dosing changing
  • NotificationCenter -> UIApplication.willEnterForegroundNotification