Refactoring of roles and notifications about antagonist assignment (#16864)

* Refactoring of antagonist roles and notifications about antagonist role assignment.
Refactoring of traitor assignment methods and bug fixing.

* Announcement files moved, code is adjusted to new revision

* Play to entity changed to play to global cause of mono audio restrictions.

* Path to audio files changed to sound specifiers, unique alerts for each role.

* Uncommited changes

* New alert sounds for each antag role.

* PR review fixes

* Antagonist role assignment sound notifications moved to Systems, sounds moved to Components.

* License update

* Fixed naming and redundant parameters

---------

Co-authored-by: Титов Вячеслав Витальевич <rincew1nd@yandex.ru>

Content.Server/GameTicking/Rules/Components/NukeOperativeComponent.cs

@@ -1,3 +1,5 @@
+using Robust.Shared.Audio;
+
 namespace Content.Server.GameTicking.Rules.Components;
 
 /// <summary>
@@ -6,5 +8,9 @@ namespace Content.Server.GameTicking.Rules.Components;
 [RegisterComponent]
 public sealed class NukeOperativeComponent : Component
 {
-
+    /// <summary>
+    ///     Path to antagonist alert sound.
+    /// </summary>
+    [DataField("greetSoundNotification")]
+    public SoundSpecifier GreetSoundNotification = new SoundPathSpecifier("/Audio/Ambience/Antag/nukeops_start.ogg");
 }