Re-add Maven Timeline extension and upload artifact in CI

Author: jeanbisutti

.github/workflows/CI.yml

@@ -27,5 +27,11 @@ jobs:
       run: mvn verify -Dmaven.profile
     - name: check license header is present in all files
       run: mvn license:check
+    - name: Upload Maven Timeline
+      if: always()
+      uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4
+      with:
+        name: maven-timeline-java-${{ matrix.java }}
+        path: target/timeline/
     - name: Upload coverage to Codecov
       uses: codecov/codecov-action@75cd11691c0faa626561e295848008c8a7dddffe # v5

.mvn/extensions.xml

@@ -5,4 +5,9 @@
     <artifactId>maven-profiler</artifactId>
     <version>1.1.0</version>
   </extension>
+  <extension>
+    <groupId>io.takari.maven</groupId>
+    <artifactId>maven-timeline</artifactId>
+    <version>2.0.4</version>
+  </extension>
 </extensions>