Added Marianum Message pdf reader and backend

windows/flutter/generated_plugin_registrant.cc

@@ -6,9 +6,12 @@
 
 #include "generated_plugin_registrant.h"
 
+#include <syncfusion_pdfviewer_windows/syncfusion_pdfviewer_windows_plugin.h>
 #include <url_launcher_windows/url_launcher_windows.h>
 
 void RegisterPlugins(flutter::PluginRegistry* registry) {
+  SyncfusionPdfviewerWindowsPluginRegisterWithRegistrar(
+      registry->GetRegistrarForPlugin("SyncfusionPdfviewerWindowsPlugin"));
   UrlLauncherWindowsRegisterWithRegistrar(
       registry->GetRegistrarForPlugin("UrlLauncherWindows"));
 }

windows/flutter/generated_plugins.cmake

@@ -3,6 +3,7 @@
 #
 
 list(APPEND FLUTTER_PLUGIN_LIST
+  syncfusion_pdfviewer_windows
   url_launcher_windows
 )