Add xenos (#1204)

* Add xenos for stress test

Pretty hacky and not how I'd do it long-term

* Remove claws

* Add in unarmed combat behaviors

* Cleanuppppp

Co-authored-by: Metal Gear Sloth <metalgearsloth@gmail.com>

Content.Server/AI/Utility/AiLogic/Mimic.cs

@@ -0,0 +1,18 @@
+using Content.Server.AI.Utility.BehaviorSets;
+using JetBrains.Annotations;
+using Robust.Server.AI;
+
+namespace Content.Server.AI.Utility.AiLogic
+{
+    [AiLogicProcessor("Mimic")]
+    [UsedImplicitly]
+    public sealed class Mimic : UtilityAi
+    {
+        public override void Setup()
+        {
+            base.Setup();
+            AddBehaviorSet(new UnarmedAttackPlayersBehaviorSet(SelfEntity), false);
+            SortActions();
+        }
+    }
+}

Content.Server/AI/Utility/AiLogic/Xeno.cs

@@ -0,0 +1,19 @@
+using Content.Server.AI.Utility.BehaviorSets;
+using JetBrains.Annotations;
+using Robust.Server.AI;
+
+namespace Content.Server.AI.Utility.AiLogic
+{
+    [AiLogicProcessor("Xeno")]
+    [UsedImplicitly]
+    public sealed class Xeno : UtilityAi
+    {
+        public override void Setup()
+        {
+            base.Setup();
+            AddBehaviorSet(new IdleBehaviorSet(SelfEntity), false);
+            AddBehaviorSet(new UnarmedAttackPlayersBehaviorSet(SelfEntity), false);
+            SortActions();
+        }
+    }
+}