Support for Power BI PQX files in AzureSignTool

[NuxXDev]

Would it be possible to add support for PQX files so Microsoft Power BI Connectors can be signed using the AzureSignTool.

Currently PQX files are not a supported filetype, but they require signing.

https://github.com/dotnet/sign?tab=readme-ov-file#supported-file-types