[PDFKit] Add support for Xcode 15 beta 8 (#18974)

Per previous discussion, updated availability attributes for added
selector to be latest though Apple docs say otherwise and MacCatalyst
todo was weird, as most of the selectors mentioned are already present.

---------

Co-authored-by: GitHub Actions Autoformatter <github-actions-autoformatter@xamarin.com>

src/pdfkit.cs

@@ -920,6 +920,10 @@ namespace PdfKit {
 		[MacCatalyst (13, 1)]
 		[NullAllowed, Export ("stampName")]
 		string StampName { get; set; }
+
+		[iOS (17, 0), Mac (14, 0), MacCatalyst (17, 0)]
+		[Export ("activatableTextField")]
+		bool ActivatableTextField { [Bind ("isActivatableTextField")] get; }
 	}
 
 	[NoiOS]

tests/xtro-sharpie/api-annotations-dotnet/MacCatalyst-PDFKit.todo

@@ -1,8 +0,0 @@
-!missing-protocol-conformance! PDFView should conform to UIFindInteractionDelegate
-!missing-selector! PDFView::findInteraction not bound
-!missing-selector! PDFView::isFindInteractionEnabled not bound
-!missing-selector! PDFView::isInMarkupMode not bound
-!missing-selector! PDFView::pageOverlayViewProvider not bound
-!missing-selector! PDFView::setFindInteractionEnabled: not bound
-!missing-selector! PDFView::setInMarkupMode: not bound
-!missing-selector! PDFView::setPageOverlayViewProvider: not bound

tests/xtro-sharpie/api-annotations-dotnet/iOS-PDFKit.todo

@@ -1 +0,0 @@
-!missing-selector! PDFAnnotation::isActivatableTextField not bound

tests/xtro-sharpie/api-annotations-dotnet/macOS-PDFKit.todo

@@ -1 +0,0 @@
-!missing-selector! PDFAnnotation::isActivatableTextField not bound

tests/xtro-sharpie/iOS-PDFKit.todo

@@ -1 +0,0 @@
-!missing-selector! PDFAnnotation::isActivatableTextField not bound

tests/xtro-sharpie/macOS-PDFKit.todo

@@ -1 +0,0 @@
-!missing-selector! PDFAnnotation::isActivatableTextField not bound