Traitor (#2566)

* basic implementation

* minor fixes

* objectives temp commit

* proper onstart bind

* changes all conditions to be bound to a mind-instance

* oops

* oops v2

* adds possiblity to enable duplicate assignment of objective
equal objectives are unable to be added

* minor fixes, adds greentext

* refactors incompatability to be defined by requirements

* fixes a wrong whitespace

* minor fix

* addressed reviews v1

* address reviews v2

Co-authored-by: Exp <theexp111@gmail.com>

* final sweep

* adds/refactors traitor&sss cvars

* Update Content.Server/Mobs/Mind.cs

* never trust github web

* adds datasets & makes codewords use them

* addresses exp's reviews

* addressed zumos reviews

Co-authored-by: Paul <ritter.paul1+git@googlemail.com>
Co-authored-by: Exp <theexp111@gmail.com>

Content.Server/Objectives/Requirements/IncompatibleConditionsRequirement.cs

@@ -0,0 +1,32 @@
+using System.Collections.Generic;
+using Content.Server.Mobs;
+using Content.Server.Objectives.Interfaces;
+using Robust.Shared.Serialization;
+
+namespace Content.Server.Objectives.Requirements
+{
+    public class IncompatibleConditionsRequirement : IObjectiveRequirement
+    {
+        private List<string> _incompatibleConditions = new();
+        public void ExposeData(ObjectSerializer serializer)
+        {
+            serializer.DataField(this, x=>x._incompatibleConditions, "conditions", new List<string>());
+        }
+
+        public bool CanBeAssigned(Mind mind)
+        {
+            foreach (var objective in mind.AllObjectives)
+            {
+                foreach (var condition in objective.Conditions)
+                {
+                    foreach (var incompatibleCondition in _incompatibleConditions)
+                    {
+                        if (incompatibleCondition == condition.GetType().Name) return false;
+                    }
+                }
+            }
+
+            return true;
+        }
+    }
+}