Run all tests in native on CI and update docs

DEVSIX-8795

Author: vitali-pr

BUILDING.md

@@ -42,6 +42,18 @@ $ mvn clean install \
     > >(tee mvn.log) 2> >(tee mvn-error.log >&2)
 ```
 
+Starting from version 8.0.3 iText Core supports native image compilation using [GraalVM][4]. Follow the instructions at
+[Getting started](https://www.graalvm.org/latest/getting-started/) to build your first native application out of java sources.
+
+To run tests in native mode [GraalVM][4] for JDK 22 or higher must be installed and native profile must be used as follows
+```bash
+$ mvn clean install -Pnative -DskipTests=false \
+    -Dmaven.test.failure.ignore=false \
+    -DITEXT_GS_EXEC="gs command" \
+    -DITEXT_MAGICK_COMPARE_EXEC="magick compare command" \
+    > >(tee mvn.log) 2> >(tee mvn-error.log >&2)
+```
+
 iText is backwards compatible in minor releases. To ensure that code changes conform to this requirement we use japicmp.
 Todo verify this execute following commands:
 
@@ -73,4 +85,6 @@ $ mvn javadoc:javadoc | grep -E "(: warning:)|(: error:)"
 
 [2]: https://www.ghostscript.com/
 
-[3]: https://www.imagemagick.org/
+[3]: https://www.imagemagick.org/
+
+[4]: https://www.graalvm.org/

README.md

@@ -86,6 +86,9 @@ public class HelloPdfApp {
 }
 ```
 
+### GraalVM compatibility
+Starting from version 8.0.3 iText Core supports native image compilation using GraalVM. See [building] for details. 
+
 ### Examples
 
 This is a small subset of examples to get you started. For more advanced examples, refer to our [Knowledge Base](https://kb.itextpdf.com/home/it7kb/examples) or the following links:

layout/src/test/java/com/itextpdf/layout/PdfUA2AnnotationsTest.java

@@ -230,7 +230,7 @@ public void pdfUA2ScreenAnnotationsTest() throws IOException, XMPException {
             pdfPage.addAnnotation(screen);
             pdfPage.flush();
         }
-        Assertions.assertNotNull(new VeraPdfValidator().validate(outFile));// Android-Conversion-Skip-Line (TODO DEVSIX-7377 introduce pdf\a validation on Android)
+        new VeraPdfValidator().validateFailure(outFile);// Android-Conversion-Skip-Line (TODO DEVSIX-7377 introduce pdf\a validation on Android)
     }
 
     @Test