Update build-skiptests.yml, add Linux jpackage

Author: dzlabing

.github/workflows/build-skiptests.yml

@@ -25,3 +25,16 @@ jobs:
         path: |
           RMBTClient/build/libs/*-all.jar
         retention-days: 365
+    - name: Build jpackage
+      run: |
+        cd RMBTClient/build/
+        ls *
+        jpackage --input libs --name "RTR-Netztest" --main-jar RMBTClient-all.jar  --main-class at.rtr.rmbt.client.RMBTClientRunner --type app-image --app-version "1.0.19"  --vendor "RTR" --verbose --arguments --log  --description ".desc"
+        ls *
+    - name: Archive files tar
+      uses: actions/upload-artifact@v4
+      with:
+        name: outputs-linux-x64
+        path: |
+          RMBTClient/build/RTR-Netztest/*
+        retention-days: 365