Add GitHub Actions workflow for Java 24 build

- Uses Oracle JDK 24 Early Access
- Builds and packages the project with Maven
- Runs on push to main and pull requests

Author: simbo1905

.github/workflows/maven.yml

@@ -0,0 +1,33 @@
+name: Java CI with Maven
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v4
+    
+    - name: Set up JDK 24
+      uses: actions/setup-java@v4
+      with:
+        java-version: '24-ea'
+        distribution: 'oracle'
+    
+    - name: Cache Maven dependencies
+      uses: actions/cache@v4
+      with:
+        path: ~/.m2
+        key: ${{ runner.os }}-m2-${{ hashFiles('**/pom.xml') }}
+        restore-keys: ${{ runner.os }}-m2
+    
+    - name: Build with Maven
+      run: mvn clean compile
+    
+    - name: Package JAR
+      run: mvn package