Added new HTN operations and preconditions (#27486)

* Added new HTN operations & preconditions

* Ok I forgot about partial

* Namespace pierce the skies

* Some fixes, debug and new operators

* Bruh git eat my files

Content.Server/NPC/HTN/PrimitiveTasks/Operators/Math/AddFloatOperator.cs

@@ -0,0 +1,33 @@
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace Content.Server.NPC.HTN.PrimitiveTasks.Operators.Math;
+
+/// <summary>
+/// Gets the key, and adds the value to that float
+/// </summary>
+public sealed partial class AddFloatOperator : HTNOperator
+{
+    [Dependency] private readonly IEntityManager _entManager = default!;
+
+    [DataField(required: true)]
+    public string TargetKey = string.Empty;
+
+    [DataField, ViewVariables(VVAccess.ReadWrite)]
+    public float Amount;
+
+    public override async Task<(bool Valid, Dictionary<string, object>? Effects)> Plan(NPCBlackboard blackboard,
+        CancellationToken cancelToken)
+    {
+        if (!blackboard.TryGetValue<float>(TargetKey, out var value, _entManager))
+            return (false, null);
+
+        return (
+            true,
+            new Dictionary<string, object>
+            {
+                { TargetKey, value + Amount }
+            }
+        );
+    }
+}