cicd: added configuration files of github actions workflow

.github/workflows/java-ci.yml

@@ -0,0 +1,29 @@
+name: Java CI
+
+on:
+  push:
+    branches: [ '*', '*/*' ]
+
+jobs:
+  build:
+    name: Build for GraalVM (OpenJDK ${{ matrix.javaver }}) on ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        javaver: [21, 23, 24, 25]
+        os: [ubuntu-latest]
+    steps:
+    - uses: actions/checkout@v6
+    - name: GitHub Action for GraalVM
+      uses: graalvm/setup-graalvm@v1
+      with:
+        java-version: ${{ matrix.javaver }}
+        distribution: 'graalvm'
+        github-token: ${{ secrets.GITHUB_TOKEN }}
+        native-image-job-reports: 'true'
+    - run: docker compose -f env/standalone-docker/docker-compose.yml up -d
+    - name: Build and test
+      run: mvn package
+    - name: Native test
+      run: mvn -Pnative test

.github/workflows/javadoc.yml

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+name: Javadoc
+
+on:
+  release:
+    types: [ created ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v6
+    - name: GitHub Action for GraalVM
+      uses: graalvm/setup-graalvm@v1
+      with:
+        java-version: 25
+        distribution: 'graalvm'
+        github_token: ${{ secrets.GITHUB_TOKEN }}
+    - name: Compile
+      run: mvn compile
+    - name: Javadoc
+      run: mvn javadoc:javadoc
+    - name: Publish Documentation on GitHub Pages
+      uses: peaceiris/actions-gh-pages@v4
+      with:
+        github_token: ${{ secrets.GITHUB_TOKEN }}
+        publish_dir: ./target/site/apidocs

.github/workflows/publish.yml

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+name: Publish package to the Maven Central Repository
+
+on:
+  release:
+    types: [ created ]
+
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+    steps:
+      - uses: actions/checkout@v6
+
+      - name: Set up JDK
+        uses: actions/setup-java@v5
+        with:
+          distribution: 'temurin'
+          java-version: 21
+
+      - name: Build with Maven
+        run: mvn -ntp -B package
+
+      - name: Set up Maven Central Repository
+        uses: actions/setup-java@v5
+        with:
+          java-version: 21
+          distribution: 'temurin'
+          server-id: central
+          server-username: MAVEN_USERNAME
+          server-password: MAVEN_PASSWORD
+          gpg-private-key: ${{ secrets.CENTRAL_GPG_PRIVATE_KEY }}
+          gpg-passphrase: MAVEN_GPG_PASSPHRASE
+
+      - name: Publish to the Maven Central Repository
+        run: mvn -ntp -B -DskipTests -Prelease-central deploy
+        env:
+          MAVEN_USERNAME: ${{ secrets.CENTRAL_TOKEN_USERNAME }}
+          MAVEN_PASSWORD: ${{ secrets.CENTRAL_TOKEN_PASSWORD }}
+          MAVEN_GPG_PASSPHRASE: ${{ secrets.CENTRAL_GPG_PASS_PHRASE }}