Improve Visio Export Compatibility with Third-Party Visio-Format Tools

NetBrain currently exports maps in a Visio format that fails to open correctly in other applications supporting the Visio file format, such as LibreOffice Draw, OpenOffice Draw, and draw.io. This enhancement proposes reviewing and adjusting the Visio export generation to align with the standard Visio file specification, ensuring broader compatibility across third-party tools. Customers who do not use Microsoft Visio internally rely on alternative Visio-compatible applications, and improved format compatibility would allow them to view and edit exported maps without errors.