Allow PBIInspectorCLI to run cross-platform (CI/CD Pipelines)

[RhysTabor-dev]

Hey @NatVanG,

Really like this project concept, it's a huge help toward BI / Analytics teams having a coherent CI/CD pipeline.

Whilst looking at integrating the PBI Inspector to our CI pipeline, this would currently introduce a windows build agent dependency.
Are you open to expanding this project to support cross platform? I was thinking that SkiaSharp would be a viable alternative to System.Drawing?

If you're looking for additional contributors, I'd be happy to help.