Added pullrequest workflow

Author: mirkosertic

.github/workflows/pullrequest.yml

@@ -0,0 +1,17 @@
+name: Pull Request
+on:
+  pull_request:
+    branches: [ master ]
+jobs:
+  build:
+    if: github.repository == 'mirkosertic/MetaIR'
+    environment: ci
+    runs-on: 'ubuntu-latest'
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-java@v4
+        with:
+          java-version: 25
+          distribution: "temurin"
+          cache: maven
+      - run: mvn --no-transfer-progress --batch-mode --settings .mvn/settings.xml clean javadoc:jar verify