added snapshot building

Author: vanrogu

.github/workflows/build-and-deploy-snapshot.yaml

@@ -0,0 +1,56 @@
+name: build-and-deploy-snapshot
+
+run-name: "build-and-deploy-snapshot [${{ github.ref_name }}]"
+
+on:
+  workflow_dispatch:
+
+permissions:
+  contents: write
+  actions: read
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout develop branch
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+          token: ${{ secrets.GITHUB_TOKEN }}
+      
+      - name: Set up JDK 21
+        uses: actions/setup-java@v4
+        with:
+          java-version: '21'
+          distribution: 'temurin'
+          cache: 'maven'
+          server-id: central
+          server-username: MAVEN_CENTRAL_USERNAME
+          server-password: MAVEN_CENTRAL_PASSWORD
+      
+      - name: Get current version
+        run: |
+          CURRENT_VERSION=$(mvn help:evaluate -Dexpression=project.version -q -DforceStdout)
+          echo "Current version: $CURRENT_VERSION"
+          echo "CURRENT_VERSION=$CURRENT_VERSION" >> $GITHUB_ENV
+          
+      - name: Verify SNAPSHOT version
+        run: |
+          if [[ ! "$CURRENT_VERSION" =~ -SNAPSHOT$ ]]; then
+            echo "Error: Version $CURRENT_VERSION is not a SNAPSHOT version"
+            exit 1
+          fi
+
+      - name: Import GPG key
+        run: |
+          echo "${{ secrets.GPG_PRIVATE_KEY }}" | base64 --decode | gpg --batch --import
+          gpg --list-secret-keys --keyid-format LONG
+
+      - name: Build and deploy to Maven Central
+        run: mvn -B -DskipTests clean deploy -Pgpg-ci
+        env:
+          MAVEN_CENTRAL_USERNAME: ${{ secrets.MAVEN_CENTRAL_USERNAME }}
+          MAVEN_CENTRAL_PASSWORD: ${{ secrets.MAVEN_CENTRAL_PASSWORD }}
+          GPG_PASSPHRASE: ${{ secrets.GPG_PASSPHRASE }}