Add OCR import support for void critical table

src/RolemasterDb.ImportTool/PdfDocumentInfo.cs

@@ -0,0 +1,8 @@
+namespace RolemasterDb.ImportTool;
+
+public sealed class PdfDocumentInfo(int pageCount, double pageWidthPoints, double pageHeightPoints)
+{
+    public int PageCount { get; } = pageCount;
+    public double PageWidthPoints { get; } = pageWidthPoints;
+    public double PageHeightPoints { get; } = pageHeightPoints;
+}