Add workflow yml file

.github/workflows/publish.yml

@@ -0,0 +1,54 @@
+name: Publish to Maven Central
+
+on:
+  release:
+    types: [ created ]
+
+jobs:
+  publish:
+    name: Publish to Maven Central
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Set up JDK 21
+        uses: actions/setup-java@v4
+        with:
+          java-version: '21'
+          distribution: corretto
+          server-id: central
+          server-username: SERVER_USERNAME
+          server-password: SERVER_PASSWORD
+          gpg-private-key: ${{ secrets.GPG_PRIVATE_KEY }}
+          gpg-passphrase: GPG_PASSPHRASE
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.12'
+
+      - name: Install test file generator requirements
+        run: |
+          pip install -r test-requirements.txt
+
+      - name: Locate Python
+        id: locate-python
+        run: echo "python-path=$(which python)" >> "$GITHUB_OUTPUT"
+
+      - name: Set version from release tag
+        run: mvn versions:set -DnewVersion="${REF_NAME#v}"
+        env:
+          REF_NAME: ${{ github.ref_name }}
+
+      - name: Publish
+        run: mvn --batch-mode deploy
+        env:
+          ASDF_JAVA_TESTS_PYTHON_PATH: ${{ steps.locate-python.outputs.python-path }}
+          SERVER_USERNAME: ${{ secrets.CENTRAL_USERNAME }}
+          SERVER_PASSWORD: ${{ secrets.CENTRAL_TOKEN }}
+          GPG_PASSPHRASE: ${{ secrets.GPG_PASSPHRASE }}