add pdf theme editor

Frontend/patient_manager/pubspec.yaml

@@ -35,6 +35,7 @@ dependencies:
   # The following adds the Cupertino Icons font to your application.
   # Use with the CupertinoIcons class for iOS style icons.
   cupertino_icons: ^1.0.2
+  syncfusion_flutter_core: ^26.2.10
   syncfusion_flutter_pdfviewer: ^26.1.39
   universal_html: ^2.2.4
   file_picker: ^8.0.5