[App] Real calendar manageable by admin

[danlg]

two parts

A - Calendar in app

So to sum up , by order of priority

• [x] read event in calendar
• [x] localized
• [x] add the location, see https://fullcalendar.io/docs/event_data/Event_Object/ with icon location ion-ios-location (can be technically in the body)
• [x] add in the body the event details, see https://fullcalendar.io/docs/event_data/Event_Object/ and "Non standard fields" with eventRender
• [x] "add to calendar" button for mobile in the event in calendar view (maybe replace text "add to calendar" with icon "+"). Test it on Android

Nice to have

• [x] remove old list view once al of the above is done
• [x] when clicking on an event should display day view - this is nice to have not critical - hence 30 min work

B - Calendar management for admin (not for now) Ability to add dates with calendar or public holidays. To be thought a bit more.

Then once mandatory part of A have been implemented. Move to #633

[amngupta]

"add to calendar" button for mobile in the event in calendar view (maybe replace text "add to calendar" with icon "+"). Test it on Android Test on android not finished however, the helper used is the same as initial so shouldn't be an issue.

[amngupta]

Tasklist for Admin Calendar

• [x] Subscription to populate admin calendar with events
• [x] Success and error messages for adding calendar events
• [x] Subscription for App to populate with school-wide events
• [ ] Localization
• [x] Add description field in the form