NPC refactor (#10122)

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

Content.Server/NPC/HTN/PrimitiveTasks/HTNPrimitiveTask.cs

@@ -0,0 +1,22 @@
+using Content.Server.NPC.HTN.Preconditions;
+using Robust.Shared.Prototypes;
+
+namespace Content.Server.NPC.HTN.PrimitiveTasks;
+
+[Prototype("htnPrimitive")]
+public sealed class HTNPrimitiveTask : HTNTask
+{
+    /// <summary>
+    /// Should we re-apply our blackboard state as a result of our operator during startup?
+    /// This means you can re-use old data, e.g. re-using a pathfinder result, and avoid potentially expensive operations.
+    /// </summary>
+    [DataField("applyEffectsOnStartup")] public bool ApplyEffectsOnStartup = true;
+
+    /// <summary>
+    /// What needs to be true for this task to be able to run.
+    /// The operator may also implement its own checks internally as well if every primitive task using it requires it.
+    /// </summary>
+    [DataField("preconditions")] public List<HTNPrecondition> Preconditions = new();
+
+    [DataField("operator", required:true)] public HTNOperator Operator = default!;
+}