feat: add Javadoc generation step to CI pipeline

Author: Pfeil

.github/workflows/gradle.yml

@@ -47,3 +47,18 @@ jobs:
     - name: Do one Coveralls test report
       if: matrix.os == 'ubuntu-latest' && matrix.jdk == 21
       run: ./gradlew -Dprofile=release jacocoTestReport coveralls
+  javadoc:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up openJDK version
+        uses: actions/setup-java@v4
+        with:
+          java-version: 21
+          distribution: 'zulu'
+      - name: Install Dependencies
+        run: npm install -g ro-crate-html-js
+      - name: Setup Gradle
+        uses: gradle/actions/setup-gradle@v4
+      - name: Compile Javadoc
+        run: ./gradlew javadoc