Create an event list subscription link for users to import into their own calendar

[Cengelsen]

We should have an option for users to import all events listed at Kvarteret.no/events/ into their own calendar. Echo at MatNat have a beta implementation for such a feature that can be looked at for inspiration.

All event objects should have the following properties:

• Name of event
• Start-time and end-time
• Description
• Link to purchase a ticket
• The venue of the event, alternatively location

This solution should regularly synchronize all changes and new events made, maybe once per day, to keep the event calendar list updated.