Add build, release and unit test workflow files

.github/workflows/build.yaml

@@ -0,0 +1,33 @@
+name: Gradle Build
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+
+jobs:
+  gradle:
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macos-latest]
+        java: ['8', '11', '17']
+    runs-on: ${{ matrix.os }}
+    steps:
+    - uses: actions/checkout@v4
+
+    - uses: actions/setup-java@v3
+      with:
+        distribution: 'temurin'
+        java-version: ${{ matrix.java }}
+        cache: 'gradle'
+
+    - name: Build Library
+      uses: nick-invision/retry@v2
+      with:
+        timeout_minutes: 10
+        max_attempts: 5
+        command: |
+          ./gradlew build
+
+    - name: Publish to Maven Local
+      run: ./gradlew publishToMavenLocal

.github/workflows/release.yaml

@@ -0,0 +1,25 @@
+name: Release
+on:
+  push:
+    tags:
+      - v**
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Set up JDK 17
+        uses: actions/setup-java@v2
+        with:
+          java-version: '17'
+          distribution: 'adopt'
+
+      - name: publish-to-maven-central
+        env:
+          SONATYPE_USERNAME: ${{ secrets.SONATYPE_USERNAME }}
+          SONATYPE_PASSWORD: ${{ secrets.SONATYPE_PASSWORD }}
+          GPG_PRIVATE_KEY: ${{ secrets.GPG_PRIVATE_KEY }}
+          GPG_PASSPHRASE: ${{ secrets.GPG_PASSPHRASE }}
+        run: ./gradlew publishToSonatype closeAndReleaseSonatypeStagingRepository

.github/workflows/tests-unit.yaml

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+name: tests-unit
+
+on:
+  pull_request:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Set up JDK 17
+        uses: actions/setup-java@v2
+        with:
+          java-version: '17'
+          distribution: 'adopt'
+
+      - name: Run tests
+        run: ./gradlew check