Printing: Replace PdfiumViewer with native pdfium.dll binary

Elwig/Helpers/Printing/Pdf.cs

@@ -1,5 +1,4 @@
 using Elwig.Windows;
-using PdfiumViewer;
 using System;
 using System.Collections.Generic;
 using System.Diagnostics;
@@ -27,6 +26,7 @@ namespace Elwig.Helpers.Printing {
         public static bool IsReady => WinziPrintProc != null;
 
         public static async Task Init(Action? evtHandler = null) {
+            PdfiumNative.FPDF_InitLibrary();
             // NOTE: If the WinziPrint daemon is already running this will succeed, but the process will fail.
             //       Should be no problem, as long as the daemon is not closed
             var p = new Process() { StartInfo = new() {
@@ -47,6 +47,7 @@ namespace Elwig.Helpers.Printing {
         public static Task Cleanup() {
             WinziPrintProc?.Kill(true);
             WinziPrintProc?.Close();
+            PdfiumNative.FPDF_DestroyLibrary();
             return Task.CompletedTask;
         }
 
@@ -123,9 +124,9 @@ namespace Elwig.Helpers.Printing {
 
         public static Task Print(string path, PrinterSettings settings) {
             try {
-                using var doc = PdfDocument.Load(path);
-                using var printDoc = doc.CreatePrintDocument(PdfPrintMode.CutMargin);
-                printDoc.PrinterSettings = settings;
+                using var printDoc = new PdfPrintDocument(path) {
+                    PrinterSettings = settings,
+                };
                 printDoc.Print();
             } catch (Exception e) {
                 MessageBox.Show("Beim Drucken ist ein Fehler aufgetreten:\n\n" + e.Message, "Fehler beim Drucken", MessageBoxButton.OK, MessageBoxImage.Error);