feat(demo): add demo for rotate options

vcf-pdf-viewer-demo/src/main/java/com/vaadin/componentfactory/pdfviewer/MainLayout.java

@@ -33,11 +33,13 @@ public MainLayout() {
             new RouterLink("Without zoom dropdown", WithoutZoomDropdownExample.class);
     final RouterLink sourceChangeExample =
             new RouterLink("Source change", SourceChangeExample.class);
+    final RouterLink withRotateOptionsExample =
+        new RouterLink("With rotate options", WithRotateOptionsExample.class);
 
     final VerticalLayout menuLayout = new VerticalLayout(basicExample, zoomExample,
         thumbnailsOpenExample, thumbnailsListenerExample, selectPageExample,
         customAutoFitZoomLabelsExample, withoutDownloadExample, customTitleExample, withPrintOptionExample,
-        renderingInteractiveFormsExample, withoutZoomDropdownExample, sourceChangeExample);
+        renderingInteractiveFormsExample, withoutZoomDropdownExample, sourceChangeExample, withRotateOptionsExample);
     addToDrawer(menuLayout);
     addToNavbar(drawerToggle);
   }

vcf-pdf-viewer-demo/src/main/java/com/vaadin/componentfactory/pdfviewer/WithRotateOptionsExample.java

@@ -0,0 +1,21 @@
+package com.vaadin.componentfactory.pdfviewer;
+
+import com.vaadin.flow.component.html.Div;
+import com.vaadin.flow.router.Route;
+import com.vaadin.flow.server.StreamResource;
+
+@Route(value = "with-rotate-options", layout = MainLayout.class)
+public class WithRotateOptionsExample extends Div {
+
+  public WithRotateOptionsExample() {
+
+    PdfViewer pdfViewer = new PdfViewer();
+    pdfViewer.setSizeFull();
+    StreamResource resource = new StreamResource("example.pdf", () -> getClass().getResourceAsStream("/pdf/example.pdf"));
+    pdfViewer.setSrc(resource);
+    pdfViewer.setAddRotateClockwiseButton(true);
+    pdfViewer.setAddRotateCounterClockwiseButton(true);    
+    add(pdfViewer);    
+  }
+
+}