Add SonarCloud checks

.github/workflows/check.yml

@@ -18,8 +18,18 @@ jobs:
           java-version: '17'
           cache: 'gradle'
 
+      - name: Cache SonarCloud packages
+        uses: actions/cache@v1
+        with:
+          path: ~/.sonar/cache
+          key: ${{ runner.os }}-sonar
+          restore-keys: ${{ runner.os }}-sonar
+
       - name: Run tests
-        run: ./gradlew check --no-daemon
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}
+        run: ./gradlew check sonarqube --no-daemon
 
       - name: Publish test reports
         uses: mikepenz/action-junit-report@v2