Construction graph improvements (#17960)

Content.Shared/Construction/IGraphTransform.cs

@@ -0,0 +1,16 @@
+namespace Content.Shared.Construction;
+
+public interface IGraphTransform
+{
+    public void Transform(EntityUid oldUid, EntityUid newUid, EntityUid? userUid, GraphTransformArgs args);
+}
+
+public readonly struct GraphTransformArgs
+{
+    public readonly IEntityManager EntityManager;
+
+    public GraphTransformArgs(IEntityManager entityManager)
+    {
+        EntityManager = entityManager;
+    }
+}