NPC refactor (#10122)

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

Content.Server/NPC/HTN/PrimitiveTasks/Operators/RandomOperator.cs

@@ -0,0 +1,36 @@
+using System.Threading.Tasks;
+using Robust.Shared.Random;
+
+namespace Content.Server.NPC.HTN.PrimitiveTasks.Operators;
+
+public sealed class RandomOperator : HTNOperator
+{
+    [Dependency] private readonly IRobustRandom _random = default!;
+
+    /// <summary>
+    /// Target blackboard key to set the value to. Doesn't need to exist beforehand.
+    /// </summary>
+    [DataField("targetKey", required: true)] public string TargetKey = string.Empty;
+
+    /// <summary>
+    ///  Minimum idle time.
+    /// </summary>
+    [DataField("minKey", required: true)] public string MinKey = string.Empty;
+
+    /// <summary>
+    ///  Maximum idle time.
+    /// </summary>
+    [DataField("maxKey", required: true)] public string MaxKey = string.Empty;
+
+    public override async Task<(bool Valid, Dictionary<string, object>? Effects)> Plan(NPCBlackboard blackboard)
+    {
+        return (true, new Dictionary<string, object>()
+        {
+            {
+                TargetKey,
+                _random.NextFloat(blackboard.GetValueOrDefault<float>(MinKey),
+                    blackboard.GetValueOrDefault<float>(MaxKey))
+            }
+        });
+    }
+}