Sync minor changes made to improve samples.
Update sample for PDF/X-4.
Update DotNetCore with SkiaSharp APIs
Update for .NETCore 6
Java Samples: Use Library.getResourceDirectory() to find the resources
Robust means of finding the resources when organized by Maven
Sync minor changes made to improve samples. Update sample for PDF/X-4. Update DotNetCore with SkiaSharp APIs Update for .NETCore 6 Java Samples: Use Library.getResourceDirectory() to find the resources