Describe the bug
When a PDF is being exported for a selected document. a System.IO.DirectoryNotFoundException is being thrown when the length of the directory path name being created to store PDF and extra metadata is > 259 characters resulting in that document not being exported.

To Reproduce
Steps to reproduce the behavior:

1. Select documents to export in Documents list
2. Click File menu and then Export
3. Select target folder
4. Click OK
5. See error

Expected behavior
PDF document and extra metadata for each selected documents should be exported into the selected folder as Author\Subject\Title.pdf (and xml).

Desktop (please complete the following information):
OS: Windows 10 22H2
PDFKeeper Version: 11.0.0 and lower

Additional context
System.IO.DirectoryNotFoundException: Could not find a part of the path '<DIR_PATH_REDACTED>'.
at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
at System.IO.Directory.InternalCreateDirectory(String fullPath, String path, Object dirSecurityObj, Boolean checkHost)
at PDFKeeper.Core.Commands.ExportDocumentCommand.Execute()
at PDFKeeper.Core.Presenters.MainPresenter.ProcessEachCheckedDocument(CheckedDocumentAction checkedDocumentAction, String value)
at PDFKeeper.Core.Presenters.MainPresenter.ExportEachSelectedDocument()
at PDFKeeper.WinForms.Views.MainForm.ToolStripItem_Click(Object sender, EventArgs e)
at System.Windows.Forms.ToolStripItem.RaiseEvent(Object key, EventArgs e)
at System.Windows.Forms.ToolStripMenuItem.OnClick(EventArgs e)
at System.Windows.Forms.ToolStripItem.HandleClick(EventArgs e)
at System.Windows.Forms.ToolStripItem.HandleMouseUp(MouseEventArgs e)
at System.Windows.Forms.ToolStrip.OnMouseUp(MouseEventArgs mea)
at System.Windows.Forms.ToolStripDropDown.OnMouseUp(MouseEventArgs mea)
at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ToolStrip.WndProc(Message& m)
at System.Windows.Forms.ToolStripDropDown.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)