Fix deprecated interfaceOrientation on iOS 26

Use effectiveGeometry.interfaceOrientation on iOS 26+ while keeping
the old interfaceOrientation call for earlier iOS versions.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: CedricGuillemet

Dependencies/xr/Source/ARKit/XR.mm

@@ -259,11 +259,18 @@ - (void) UnlockAnchors {
 - (UIInterfaceOrientation)orientation {
     UIApplication* sharedApplication = [UIApplication sharedApplication];
 #if (__IPHONE_OS_VERSION_MIN_REQUIRED >= __IPHONE_13_0)
-    UIScene* scene = [[[sharedApplication connectedScenes] allObjects] firstObject];
-    return [(UIWindowScene*)scene interfaceOrientation];
+    UIWindowScene* windowScene = (UIWindowScene*)[[[sharedApplication connectedScenes] allObjects] firstObject];
+    if (@available(iOS 26.0, *)) {
+        return windowScene.effectiveGeometry.interfaceOrientation;
+    }
+    return [windowScene interfaceOrientation];
 #else
     if (@available(iOS 13.0, *)) {
-        return [[[[sharedApplication windows] firstObject] windowScene] interfaceOrientation];
+        UIWindowScene* windowScene = [[[sharedApplication windows] firstObject] windowScene];
+        if (@available(iOS 26.0, *)) {
+            return windowScene.effectiveGeometry.interfaceOrientation;
+        }
+        return [windowScene interfaceOrientation];
     }
     else {
         return [sharedApplication statusBarOrientation];