feat: add confirmation button to info alternatives

### Additions

* added new type `ConfirmationType`
* added field `confirmation: ConfirmationType` to `InjectDetailsType` type
* added field `confirmed: Boolean` to `InjectDetailsType` type
* added field `confirmedBy: RestrictedUser` to `InjectDetailsType` type
* added field `timestampConfirmed: DateTime` to `InjectDetailsType` type
* added field `eventType: EventType!` to `ActionLogsSubscription` subscription
* added field `eventType: EventType!` to `AnalyticsActionLogsSubscription` subscription
* added new mutation `confirmAction(teamId: ID!, logId: ID!): ActionLogType!`

### Changes

* renamed `ExerciseEventTypeEnum` to `EventType`

Closes #351