Add utility AI (#806)

Co-authored-by: Pieter-Jan Briers <pieterjan.briers@gmail.com>
Co-authored-by: Metal Gear Sloth <metalgearsloth@gmail.com>
Co-authored-by: Pieter-Jan Briers <pieterjan.briers+git@gmail.com>

Content.Server/AI/Utility/Curves/InverseBoolCurve.cs

@@ -0,0 +1,11 @@
+namespace Content.Server.AI.Utility.Curves
+{
+    public struct InverseBoolCurve : IResponseCurve
+    {
+        public float GetResponse(float score)
+        {
+            // ReSharper disable once CompareOfFloatsByEqualityOperator
+            return score == 0.0f ? 1.0f : 0.0f;
+        }
+    }
+}