Make HTN constantly replanning optional (#33023)

Make constant replanning optional
And apply it to our most expensive NPCs

Content.Server/NPC/HTN/HTNComponent.cs

@@ -37,6 +37,9 @@ public sealed partial class HTNComponent : NPCComponent
     [ViewVariables(VVAccess.ReadWrite)]
     public float PlanAccumulator = 0f;
 
+    [DataField]
+    public bool ConstantlyReplan = true;
+
     [ViewVariables]
     public HTNPlanJob? PlanningJob = null;