Add CD workflow for Gradle Plugin Portal

.github/workflows/cd.yaml

@@ -0,0 +1,44 @@
+name: CD - Publish to Gradle Plugin Portal
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    environment: release
+
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v3
+
+    - name: Set up JDK 17
+      uses: actions/setup-java@v3
+      with:
+        distribution: 'zulu'
+        java-version: '17'
+
+    - name: Cache Gradle dependencies
+      uses: actions/cache@v3
+      with:
+        path: |
+          ~/.gradle/caches
+          ~/.gradle/wrapper
+        key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle*', '**/gradle-wrapper.properties') }}
+        restore-keys: |
+          ${{ runner.os }}-gradle-
+
+    - name: Grant execute permission for Gradle Wrapper
+      run: chmod +x gradle-plugin/gradlew
+
+    - name: Build plugin
+      run: |
+        cd gradle-plugin
+        ./gradlew build
+
+    - name: Publish to Gradle Plugin Portal
+      run: |
+        cd gradle-plugin
+        ./gradlew publishPlugins -Pgradle.publish.key=${{ secrets.GRADLE_PUBLISH_KEY }} -Pgradle.publish.secret=${{ secrets.GRADLE_PUBLISH_SECRET }}