Recurring tasks UI

[RayBB]

This is a branch and PR to track my progress getting the recurring tasks UI working. nextcloud#34

The current plan is to try to use the nextcloud/calendar repeat component which looks like this:
https://user-images.githubusercontent.com/921217/172023766-9ad7b775-79c4-4c04-afac-0711244734fc.mp4

Current Challenges

• What is the best way to get the Repeat component from nextcloud/calendar? Right now it's just copy/pasted
• How to handle the missing imports from Repeat
• Figure out how to get the Repeat component to show
  • How to get calendarObjectInstance or similar

Commands to get my local environment setup

docker run  -d --name nc --rm -p 8080:80 \
-v ~/Documents/nextcloud:/tasks_dev \
nextcloud

docker exec -it nc  ln -s /tasks_dev/tasks/ /var/www/html/apps/tasks

[BaderSZ]

recurrence options that make sense include:
hourly, daily at x hr, weekly at x weekday, monthly on day x or on the first/second/third/last weekday. Yearly, if we want to push it. I think the NC Calendar implementation has all of this, except for hourly recurrence.

[BaderSZ]

And there won't be a need for CalendarObjectInstance, since TaskObject implements the exact same thing in practice.