NPC refactor (#10122)

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

Content.Server/NPC/Systems/NPCSystem.Blackboard.cs

@@ -0,0 +1,17 @@
+using Content.Server.NPC.Components;
+
+namespace Content.Server.NPC.Systems;
+
+public sealed partial class NPCSystem
+{
+    public void SetBlackboard(EntityUid uid, string key, object value, NPCComponent? component = null)
+    {
+        if (!Resolve(uid, ref component, false))
+        {
+            return;
+        }
+
+        var blackboard = component.Blackboard;
+        blackboard.SetValue(key, value);
+    }
+}