[CRUD - DELETE] - The PRE_DELETE event should be able to cancel removing

[mcsky]

Biig\Melodiia\Crud\Controller\Delete

For the moment nothing is done to be able to cancel the removing of the resource, but it could be useful for some domain reasons.

Create a new type of event (PreDeleteEvent?) accepting these methods:

• cancelDelete(): void
• isDeletion(): boolean
• delete(): void

The last listener which calls cancel or delete takes the way on other previous.
If isDeletion() return false, the call to $this->dataStore->remove($data) should be avoided.