[DELEGATION] Edit attendance and events, delete event for someone (#553)

* [#523] added way to manage attendance for delegated calendars

* [DELEGATION] #523 & #524 changed eventURL calculation for delegated events to have the rigth one

* [#524] added drag and drop authorisation to delegated event

* [#524] added tests

* [#524] support for the permission access

* [#524] no edit when delegated event is not public

__test__/features/Calendars/CalendarAPI.test.tsx

@@ -30,7 +30,7 @@ describe("Calendar API", () => {
     const calendars = await getCalendars(mockUserId);
 
     expect(api.get).toHaveBeenCalledWith(
-      `dav/calendars/${mockUserId}.json?personal=true&sharedDelegationStatus=accepted&sharedPublicSubscription=true&`,
+      `dav/calendars/${mockUserId}.json?personal=true&sharedDelegationStatus=accepted&sharedPublicSubscription=true&withRights=true`,
       {
         headers: { Accept: "application/calendar+json" },
       }