Add event status property

[JHPG]

Currently, the event object doesn't have the possible status of an event invitation, like "confirmed", "canceled", "tentative", etc.

iOS status values:

• https://developer.apple.com/documentation/eventkit/ekeventstatus?changes=__8&language=objc

Android status values:

• https://developer.android.com/reference/android/provider/CalendarContract.EventsColumns#STATUS

Environment

Doesn't apply.

Steps to Reproduce

Logging the fetchAllEvents result and checking the properties.

Expected Behavior

Show the current status on the event's properties, when it was created with an invitation.

Actual Behavior

The event object doesn't have this field.