Replace PhasedEvent with Event

PhasedEvent is related to Interrptive Events. We should instead use a Event annotation.

Characteristics:
* By default : NIE
* Values : NIE, IE
* More than one step can have one
* in NIE : The scenario is suffled based on the number of Events
* in IE:
* if more than one exist in a scenario : throw an exception
* work as Phased Event
* When both Phased Event and Event exist, Event takes precedence.
* Issue Warning when it is the case
* Allow for hard coded event name declaration
* Allow for wrapping declarion (default : 33)
* Set PhasedEvent to Deprecated

Start by locating the existing PhasedEvent annotation and its related event-processing entry points and tests. Compare the requested Event annotation behavior with the current implementation, including NIE and IE handling, precedence, warnings, exceptions, hard-coded names, wrapping declarations, and deprecation. Done means the replacement behavior is specified, implemented, and covered by tests.

Written by the indexing model from the issue text.