Refactor antag rule code (#23445)

* Initial Pass, Rev, Thief

* Zombie initial pass

* Rebase, Traitor

* Nukeops, More overloads

* Revert RevolutionaryRuleComponent

* Use TryRoundStartAttempt, Rewrite nukie spawning

* Comments, Add task scheduler to GameRuleSystem

* Zombie initial testing done

* Sort methods, rework GameRuleTask

* Add CCVar, Initial testing continues

* Might as well get rid of the obsolete logging

* Oops, i dont know how to log apparently

* Suggested formatting fixes

* Suggested changes

* Fix merge issues

* Minor optimisation

* Allowed thief to choose other antags

* Review changes

* Spawn items on floor first, then inserting

* minor tweaks

* Shift as much as possible to ProtoId<>

* Remove unneeded

* Add exclusive antag attribute

* Fix merge issues

* Minor formatting fix

* Convert to struct

* Cleanup

* Review cleanup (need to test a lot)

* Some fixes, (mostly) tested

* oop

* Pass tests (for real)

---------

Co-authored-by: Rainfall <rainfey0+git@gmail.com>
Co-authored-by: AJCM <AJCM@tutanota.com>

Content.Shared/Roles/AntagonistRoleComponent.cs

@@ -1,4 +1,5 @@
-using Robust.Shared.Serialization.TypeSerializers.Implementations.Custom.Prototype;
+using JetBrains.Annotations;
+using Robust.Shared.Serialization.TypeSerializers.Implementations.Custom.Prototype;
 
 namespace Content.Shared.Roles;
 
@@ -7,3 +8,13 @@ public abstract partial class AntagonistRoleComponent : Component
     [DataField("prototype", required: true, customTypeSerializer: typeof(PrototypeIdSerializer<AntagPrototype>))]
     public string? PrototypeId;
 }
+
+/// <summary>
+/// Mark the antagonist role component as being exclusive
+/// IE by default other antagonists should refuse to select the same entity for a different antag role
+/// </summary>
+[AttributeUsage(AttributeTargets.Class, Inherited = false)]
+[BaseTypeRequired(typeof(AntagonistRoleComponent))]
+public sealed partial class ExclusiveAntagonistAttribute : Attribute
+{
+}