feat: add artifact-version.groovy expected by Jenkins build

artifact-version.groovy

+// Script executed by Jenkins build
+// Get project version version and assign to ARTIFACT_VERSION parameter
+import hudson.model.*
+import java.util.jar.*
+def build = Thread.currentThread().executable
+
+Manifest manifest = new Manifest(
+  new FileInputStream(
+    new File("${build.workspace}/build/tmp/jar/MANIFEST.MF")));
+
+def version = manifest.getAttributes().getValue(Attributes.Name.IMPLEMENTATION_VERSION)
+println "Artifact version is $version"
+build.addAction(
+  new ParametersAction([
+    new StringParameterValue("ARTIFACT_VERSION", version),
+  ])
+)