chore: added gradle build github workflow

.github/workflows/gradle-build.yml

@@ -0,0 +1,41 @@
+# SPDX-FileCopyrightText: 2024 Deutsche Telekom AG
+#
+# SPDX-License-Identifier: Apache-2.0
+
+name: Gradle Build and Test
+on:
+  push:
+  pull_request:
+    branches:
+      - main
+jobs:
+  gradle:
+    runs-on: ubuntu-latest
+
+    services:
+      docker:
+        image: docker:25-dind
+
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-java@v4
+        with:
+          distribution: temurin
+          java-version: 21
+
+      - name: Setup Gradle
+        uses: gradle/actions/setup-gradle@v3
+
+      - name: Execute Gradle build
+        run: ./gradlew build
+
+      - name: Add coverage to PR
+        id: jacoco
+        uses: madrapps/jacoco-report@v1.6.1
+        with:
+          paths: |
+            ${{ github.workspace }}/**/build/reports/jacoco/**/jacocoTestReport.xml
+          token: ${{ secrets.GITHUB_TOKEN }}
+          min-coverage-overall: 60
+          min-coverage-changed-files: 80
+        if: github.event_name == 'pull_request'