ci: Add PMD and CPD checks to Maven build workflow

- Added `mvn pmd:check pmd:cpd-check` to `.github/workflows/maven.yml`
- Added the "MoreUnit Build" badge to the `README.md` to reflect the CI status (which now includes PMD and CPD)

Co-authored-by: RoiSoleil <3462260+RoiSoleil@users.noreply.github.com>

Author: google-labs-jules[bot]

.github/workflows/maven.yml

@@ -37,6 +37,9 @@ jobs:
       - name: Build and verify
         run: mvn -file org.moreunit.build/pom.xml clean install "-Dtarget.platform.classifier=eclipse-latest" --fail-at-end --batch-mode --strict-checksums --update-snapshots "-Dorg.slf4j.simpleLogger.log.org.apache.maven.cli.transfer.Slf4jMavenTransferListener=warn"
 
+      - name: Run PMD and CPD checks
+        run: mvn -file org.moreunit.build/pom.xml pmd:check pmd:cpd-check
+
       - name: Publish Surefire Test Results for  🖨
         if: ${{ always() }}
         uses: ScaCap/action-surefire-report@v1

README.md

@@ -1,3 +1,4 @@
+[![MoreUnit Build](https://github.com/MoreUnit/MoreUnit-Eclipse/actions/workflows/maven.yml/badge.svg)](https://github.com/MoreUnit/MoreUnit-Eclipse/actions/workflows/maven.yml)
 [![CodeQL](https://github.com/MoreUnit/MoreUnit-Eclipse/actions/workflows/codeql-analysis.yml/badge.svg)](https://github.com/MoreUnit/MoreUnit-Eclipse/actions/workflows/codeql-analysis.yml)
 [![codecov](https://codecov.io/gh/MoreUnit/MoreUnit-Eclipse/branch/master/graph/badge.svg)](https://codecov.io/gh/MoreUnit/MoreUnit-Eclipse)