RFC: introduces some iOS widgets!

[krugerk]

Introducing WidgetKit widgets!

This MR consists of a widget bundle and three widgets.

• bundle - for allowing for more than one widget
• widgets:
  • goal countdown: displays a goal in its countdown color
  • goal list: list of goals, sorted by urgency
  • on the line: sum of pledge amount

The app already handled the url beeminder://?slug=goalname to open the goalvc of the corresponding goal and the widgets use this

breaks the ice,
fixes: #68

Examples:

list of goals

in medium and large

goal countdown color

pledged

and of course in both light and dark,

Simulator.Screen.Recording.-.iPhone.16.Pro.Max.-.2024-11-16.mp4

A widget to create a datapoint upon tap would be a welcome addition:

• user should be able to specify the goal
• user should be able to specify the amount/value for the datapoint

[theospears]

To set expectations, my release plan right now is:

• 6.7 - the new CoreData based data model, but no big feature additions
• 6.8 - if needed, a fast follow to fix crashes or other issues introduced by 6.7
• 7.0 - few features, like widgets and more shortcuts