converted build configuration from Maven to Gradle

Signed-off-by: Konstantin Läufer <[email protected]>

Author: klaeufer

.eclipse-formatter.xml

@@ -0,0 +1,36 @@
+name: Java Gradle CI
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v5
+    
+    - name: Set up JDK 21
+      uses: actions/setup-java@v5
+      with:
+        distribution: 'temurin'
+        java-version: '21'
+        cache: 'gradle'
+    
+    - name: Setup Gradle
+      uses: gradle/actions/setup-gradle@v5
+
+    - name: Build with Gradle
+      run: ./gradlew build
+      
+    - name: Upload JaCoCo coverage report
+      uses: codecov/codecov-action@v5
+      with:
+        files: ./build/reports/jacoco/test/jacocoTestReport.xml
+        fail_ci_if_error: true
+      env:
+        CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}

.github/workflows/java-gradle.yml

@@ -131,8 +131,6 @@ tasks.check {
 
 spotless {
     java {
-        // Using Eclipse formatter with custom config (2 spaces)
-        eclipse("4.31").configFile(".eclipse-formatter.xml")
         removeUnusedImports()
         trimTrailingWhitespace()
         endWithNewline()