Add DynamicViewListItem

Author: Kyle-Ye

Sources/OpenSwiftUICore/Layout/Dynamic/DynamicViewListItem.swift

@@ -0,0 +1,33 @@
+//
+//  DynamicViewListItem.swift
+//  OpenSwiftUICore
+//
+//  Audited for 6.5.4
+//  Status: Complete
+
+import OpenAttributeGraphShims
+
+struct DynamicViewListItem: DynamicContainerItem {
+    var id: ViewList.ID
+    var elements: ViewList.Elements
+    var traits: ViewTraitCollection
+    var list: Attribute<any ViewList>?
+
+    var count: Int {
+        elements.count
+    }
+
+    var needsTransitions: Bool {
+        traits.optionalTransition() != nil
+    }
+
+    var zIndex: Double {
+        traits.zIndex
+    }
+
+    func matchesIdentity(of other: DynamicViewListItem) -> Bool {
+        list == other.list && id == other.id
+    }
+
+    var viewID: _ViewList_ID? { id }
+}