Enhance Maven workflow with release publishing

Added a publish-release job to create a GitHub release with the built JAR file when a tag is pushed.

.github/workflows/maven.yml

@@ -1,17 +1,15 @@
-# This workflow will build a Java project with Maven, and cache/restore any dependencies to improve the workflow execution time
-# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-java-with-maven
-
 name: Java CI with Maven
 
 on:
   push:
     branches: [ "main" ]
+    tags:
+      - 'v*.*.*'
   pull_request:
     branches: [ "main" ]
 
 jobs:
   build:
-
     runs-on: ubuntu-latest
 
     steps:
@@ -28,13 +26,36 @@ jobs:
       run: mvn -B package
       working-directory: main
 
-    # Generate dependency graph explicitly (run step supports -f)
+    - name: Upload built JAR
+      uses: actions/upload-artifact@v4
+      with:
+        name: package
+        path: main/target/*.jar
+
     - name: Generate dependency graph
       run: mvn -B -f main/pom.xml com.github.ferstl:depgraph-maven-plugin:4.0.1:graph
 
-    # Upload the generated dependency files so you can inspect them in the workflow run
     - name: Upload dependency graph artifact
       uses: actions/upload-artifact@v4
       with:
         name: dependency-graph
         path: main/target/**
+
+  publish-release:
+    runs-on: ubuntu-latest
+    needs: [build]
+    if: startsWith(github.ref, 'refs/tags/')
+    permissions:
+      contents: write
+
+    steps:
+    - name: Download built JAR
+      uses: actions/download-artifact@v4
+      with:
+        name: package
+        path: main/target/
+
+    - name: Create GitHub Release
+      uses: softprops/action-gh-release@v2
+      with:
+        files: main/target/*.jar